diff --git a/gtsam/base/treeTraversal-inst.h b/gtsam/base/treeTraversal-inst.h
index 5ac1a55a9..318091492 100644
--- a/gtsam/base/treeTraversal-inst.h
+++ b/gtsam/base/treeTraversal-inst.h
@@ -204,7 +204,7 @@ namespace gtsam {
 
       // Add roots to stack (insert such that they are visited and processed in order
       {
-        Stack::iterator insertLocation = stack.begin();
+        typename Stack::iterator insertLocation = stack.begin();
         BOOST_FOREACH(const sharedNode& root, forest.roots())
           stack.insert(insertLocation, TraversalNode(root, rootData));
       }
@@ -225,7 +225,7 @@ namespace gtsam {
           // If not already visited, visit the node and add its children (use reverse iterators so
           // children are processed in the order they appear)
           node.dataPointer = dataList.insert(dataList.end(), visitorPre(node.treeNode, node.parentData));
-          Stack::iterator insertLocation = stack.begin();
+          typename Stack::iterator insertLocation = stack.begin();
           BOOST_FOREACH(const sharedNode& child, node.treeNode->children)
             stack.insert(insertLocation, TraversalNode(child, *node.dataPointer));
           node.expanded = true;
@@ -331,4 +331,4 @@ namespace gtsam {
     }
   }
 
-}
\ No newline at end of file
+}
diff --git a/gtsam/inference/BayesTree-inst.h b/gtsam/inference/BayesTree-inst.h
index 0a238267b..b1363c70a 100644
--- a/gtsam/inference/BayesTree-inst.h
+++ b/gtsam/inference/BayesTree-inst.h
@@ -229,7 +229,7 @@ namespace gtsam {
     boost::shared_ptr<Clique> rootContainer = boost::make_shared<Clique>();
     treeTraversal::DepthFirstForest(other, rootContainer, BayesTreeCloneForestVisitorPre<Clique>);
     BOOST_FOREACH(const sharedClique& root, rootContainer->children) {
-      root->parent_ = Clique::weak_ptr(); // Reset the parent since it's set to the dummy clique
+      root->parent_ = typename Clique::weak_ptr(); // Reset the parent since it's set to the dummy clique
       insertRoot(root);
     }
     return *this;
@@ -437,7 +437,7 @@ namespace gtsam {
   void BayesTree<CLIQUE>::removeClique(sharedClique clique)
   {
     if (clique->isRoot()) {
-      std::vector<sharedClique>::iterator root = std::find(roots_.begin(), roots_.end(), clique);
+      typename std::vector<sharedClique>::iterator root = std::find(roots_.begin(), roots_.end(), clique);
       if(root != roots_.end())
         roots_.erase(root);
     } else { // detach clique from parent
@@ -490,7 +490,7 @@ namespace gtsam {
     {
       // get the clique
       // TODO: Nodes will be searched again in removeClique
-      Nodes::const_iterator node = nodes_.find(j);
+      typename Nodes::const_iterator node = nodes_.find(j);
       if(node != nodes_.end()) {
         // remove path from clique to root
         this->removePath(node->second, bn, orphans);
diff --git a/gtsam/inference/BayesTree.h b/gtsam/inference/BayesTree.h
index 0d9604082..feca43fd2 100644
--- a/gtsam/inference/BayesTree.h
+++ b/gtsam/inference/BayesTree.h
@@ -143,7 +143,7 @@ namespace gtsam {
 
     /** alternate syntax for matlab: find the clique that contains the variable with Index j */
     const sharedClique& clique(Key j) const {
-      Nodes::const_iterator c = nodes_.find(j);
+      typename Nodes::const_iterator c = nodes_.find(j);
       if(c == nodes_.end())
         throw std::out_of_range("Requested the BayesTree clique for a key that is not in the BayesTree");
       else
@@ -272,7 +272,7 @@ namespace gtsam {
     {
       // Store parent keys in our base type factor so that eliminating those parent keys will pull
       // this subtree into the elimination.
-      keys_.assign(clique->conditional()->beginParents(), clique->conditional()->endParents());
+      this->keys_.assign(clique->conditional()->beginParents(), clique->conditional()->endParents());
     }
   };
 
diff --git a/gtsam/inference/BayesTreeCliqueBase-inst.h b/gtsam/inference/BayesTreeCliqueBase-inst.h
index 810338c57..90ca98863 100644
--- a/gtsam/inference/BayesTreeCliqueBase-inst.h
+++ b/gtsam/inference/BayesTreeCliqueBase-inst.h
@@ -25,7 +25,7 @@ namespace gtsam {
   /* ************************************************************************* */
   template<class DERIVED, class FACTORGRAPH>
   bool BayesTreeCliqueBase<DERIVED, FACTORGRAPH>::equals(
-    const DERIVED& other, double tol = 1e-9) const
+    const DERIVED& other, double tol) const
   {
     return (!conditional_ && !other.conditional())
       || conditional_->equals(*other.conditional(), tol);
diff --git a/gtsam/inference/BayesTreeCliqueBase.h b/gtsam/inference/BayesTreeCliqueBase.h
index 1e505f6cd..acf8156ab 100644
--- a/gtsam/inference/BayesTreeCliqueBase.h
+++ b/gtsam/inference/BayesTreeCliqueBase.h
@@ -17,6 +17,7 @@
 
 #pragma once
 
+#include <boost/optional.hpp>
 #include <gtsam/base/types.h>
 
 namespace gtsam {
diff --git a/gtsam/inference/Conditional-inst.h b/gtsam/inference/Conditional-inst.h
index 4069a6e2a..a22f290d9 100644
--- a/gtsam/inference/Conditional-inst.h
+++ b/gtsam/inference/Conditional-inst.h
@@ -40,7 +40,7 @@ namespace gtsam {
 
   /* ************************************************************************* */
   template<class FACTOR, class DERIVEDFACTOR>
-  bool Conditional<FACTOR,DERIVEDFACTOR>::equals(const This& c, double tol = 1e-9) const
+  bool Conditional<FACTOR,DERIVEDFACTOR>::equals(const This& c, double tol) const
   {
     return nrFrontals_ == c.nrFrontals_;
   }
diff --git a/gtsam/inference/EliminateableFactorGraph-inst.h b/gtsam/inference/EliminateableFactorGraph-inst.h
index 33a5d7b47..d75017ac8 100644
--- a/gtsam/inference/EliminateableFactorGraph-inst.h
+++ b/gtsam/inference/EliminateableFactorGraph-inst.h
@@ -143,8 +143,7 @@ namespace gtsam {
     EliminateableFactorGraph<FACTORGRAPH>::marginalMultifrontalBayesNet(
     boost::variant<const Ordering&, const std::vector<Key>&> variables,
     OptionalOrdering marginalizedVariableOrdering,
-    const Eliminate& function = EliminationTraitsType::DefaultEliminate,
-    OptionalVariableIndex variableIndex = boost::none) const
+    const Eliminate& function, OptionalVariableIndex variableIndex) const
   {
     if(variableIndex)
     {
@@ -200,8 +199,7 @@ namespace gtsam {
     EliminateableFactorGraph<FACTORGRAPH>::marginalMultifrontalBayesTree(
     boost::variant<const Ordering&, const std::vector<Key>&> variables,
     OptionalOrdering marginalizedVariableOrdering,
-    const Eliminate& function = EliminationTraitsType::DefaultEliminate,
-    OptionalVariableIndex variableIndex = boost::none) const
+    const Eliminate& function, OptionalVariableIndex variableIndex) const
   {
     if(variableIndex)
     {
@@ -256,8 +254,7 @@ namespace gtsam {
   boost::shared_ptr<FACTORGRAPH>
     EliminateableFactorGraph<FACTORGRAPH>::marginal(
     const std::vector<Key>& variables,
-    const Eliminate& function = EliminationTraitsType::DefaultEliminate,
-    OptionalVariableIndex variableIndex = boost::none) const
+    const Eliminate& function, OptionalVariableIndex variableIndex) const
   {
     if(variableIndex)
     {
diff --git a/gtsam/inference/EliminationTree-inst.h b/gtsam/inference/EliminationTree-inst.h
index f4b77efa7..1ce98a435 100644
--- a/gtsam/inference/EliminationTree-inst.h
+++ b/gtsam/inference/EliminationTree-inst.h
@@ -221,13 +221,13 @@ namespace gtsam {
     {
       FastMap<Key,sharedNode> keys;
       BOOST_FOREACH(const sharedNode& root, this->roots_) { keys.insert(std::make_pair(root->key, root)); }
-      typedef FastMap<Key,sharedNode>::value_type Key_Node;
+      typedef typename FastMap<Key,sharedNode>::value_type Key_Node;
       BOOST_FOREACH(const Key_Node& key_node, keys) { stack1.push(key_node.second); }
     }
     {
       FastMap<Key,sharedNode> keys;
       BOOST_FOREACH(const sharedNode& root, expected.roots_) { keys.insert(std::make_pair(root->key, root)); }
-      typedef FastMap<Key,sharedNode>::value_type Key_Node;
+      typedef typename FastMap<Key,sharedNode>::value_type Key_Node;
       BOOST_FOREACH(const Key_Node& key_node, keys) { stack2.push(key_node.second); }
     }
 
@@ -245,7 +245,7 @@ namespace gtsam {
       if(node1->factors.size() != node2->factors.size()) {
         return false;
       } else {
-        for(Node::Factors::const_iterator it1 = node1->factors.begin(), it2 = node2->factors.begin();
+        for(typename Node::Factors::const_iterator it1 = node1->factors.begin(), it2 = node2->factors.begin();
           it1 != node1->factors.end(); ++it1, ++it2) // Only check it1 == end because we already returned false for different counts
         {
           if(*it1 && *it2) {
@@ -261,13 +261,13 @@ namespace gtsam {
       {
         FastMap<Key,sharedNode> keys;
         BOOST_FOREACH(const sharedNode& node, node1->children) { keys.insert(std::make_pair(node->key, node)); }
-        typedef FastMap<Key,sharedNode>::value_type Key_Node;
+        typedef typename FastMap<Key,sharedNode>::value_type Key_Node;
         BOOST_FOREACH(const Key_Node& key_node, keys) { stack1.push(key_node.second); }
       }
       {
         FastMap<Key,sharedNode> keys;
         BOOST_FOREACH(const sharedNode& node, node2->children) { keys.insert(std::make_pair(node->key, node)); }
-        typedef FastMap<Key,sharedNode>::value_type Key_Node;
+        typedef typename FastMap<Key,sharedNode>::value_type Key_Node;
         BOOST_FOREACH(const Key_Node& key_node, keys) { stack2.push(key_node.second); }
       }
     }
diff --git a/gtsam/inference/ISAM.h b/gtsam/inference/ISAM.h
index 057173e0f..d920be209 100644
--- a/gtsam/inference/ISAM.h
+++ b/gtsam/inference/ISAM.h
@@ -31,7 +31,10 @@ namespace gtsam {
   private:
 
     typedef BAYESTREE Base;
+    typedef typename Base::BayesNetType BayesNetType;
     typedef typename Base::FactorGraphType FactorGraphType;
+    typedef typename Base::Clique Clique;
+    typedef typename Base::sharedClique sharedClique;
     typedef typename Base::Cliques Cliques;
     typedef typename Base::Eliminate Eliminate;
     typedef typename Base::EliminationTraitsType EliminationTraitsType;
diff --git a/gtsam/inference/Ordering.cpp b/gtsam/inference/Ordering.cpp
index eeb81e067..b0ac9669f 100644
--- a/gtsam/inference/Ordering.cpp
+++ b/gtsam/inference/Ordering.cpp
@@ -40,7 +40,8 @@ namespace gtsam {
   Ordering Ordering::COLAMD(const VariableIndex& variableIndex)
   {
     // Call constrained version with all groups set to zero
-    return Ordering::COLAMDConstrained(variableIndex, vector<int>(variableIndex.size(), 0));
+    vector<int> dummy_groups(variableIndex.size(), 0);
+    return Ordering::COLAMDConstrained(variableIndex, dummy_groups);
   }
 
   /* ************************************************************************* */