diff --git a/gtsam/geometry/Point2.h b/gtsam/geometry/Point2.h
index 74ea16638..31d89a39f 100644
--- a/gtsam/geometry/Point2.h
+++ b/gtsam/geometry/Point2.h
@@ -190,7 +190,7 @@ public:
   /// @}
 
   /// Streaming
-  friend std::ostream &operator<<(std::ostream &os, const Point2& p);
+  GTSAM_EXPORT friend std::ostream &operator<<(std::ostream &os, const Point2& p);
 
 private:
 
diff --git a/gtsam/geometry/Point3.h b/gtsam/geometry/Point3.h
index cf30bd1ff..510666bb2 100644
--- a/gtsam/geometry/Point3.h
+++ b/gtsam/geometry/Point3.h
@@ -204,7 +204,7 @@ namespace gtsam {
     /// @}
 
     /// Output stream operator
-    friend std::ostream &operator<<(std::ostream &os, const Point3& p);
+    GTSAM_EXPORT friend std::ostream &operator<<(std::ostream &os, const Point3& p);
 
   private:
 
diff --git a/gtsam/geometry/Pose3.h b/gtsam/geometry/Pose3.h
index 234e2cad6..4556f2200 100644
--- a/gtsam/geometry/Pose3.h
+++ b/gtsam/geometry/Pose3.h
@@ -291,7 +291,7 @@ namespace gtsam {
     static std::pair<size_t, size_t> rotationInterval() { return std::make_pair(0, 2); }
 
     /// Output stream operator
-    friend std::ostream &operator<<(std::ostream &os, const Pose3& p);
+    GTSAM_EXPORT friend std::ostream &operator<<(std::ostream &os, const Pose3& p);
 
   private:
     /** Serialization function */
diff --git a/gtsam/geometry/Rot3.h b/gtsam/geometry/Rot3.h
index 6adcd8a1b..9316ab33d 100644
--- a/gtsam/geometry/Rot3.h
+++ b/gtsam/geometry/Rot3.h
@@ -356,7 +356,7 @@ namespace gtsam {
     Vector quaternion() const;
 
     /// Output stream operator
-    friend std::ostream &operator<<(std::ostream &os, const Rot3& p);
+    GTSAM_EXPORT friend std::ostream &operator<<(std::ostream &os, const Rot3& p);
 
   private:
     /** Serialization function */
diff --git a/gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h b/gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h
index 706ae2b65..71fe45b47 100644
--- a/gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h
+++ b/gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h
@@ -111,7 +111,7 @@ public:
 
 protected:
 
-  friend void synchronize(ConcurrentFilter& filter, ConcurrentSmoother& smoother);
+  GTSAM_UNSTABLE_EXPORT friend void synchronize(ConcurrentFilter& filter, ConcurrentSmoother& smoother);
 
   /** Default constructor */
   ConcurrentSmoother() {};
diff --git a/gtsam_unstable/slam/serialization.h b/gtsam_unstable/slam/serialization.h
index 08451fa0c..491299fe1 100644
--- a/gtsam_unstable/slam/serialization.h
+++ b/gtsam_unstable/slam/serialization.h
@@ -14,25 +14,25 @@
 namespace gtsam {
 
 // Serialize/Deserialize a NonlinearFactorGraph
-std::string serializeGraph(const NonlinearFactorGraph& graph);
+GTSAM_EXPORT std::string serializeGraph(const NonlinearFactorGraph& graph);
 
-NonlinearFactorGraph::shared_ptr deserializeGraph(const std::string& serialized_graph);
+GTSAM_EXPORT NonlinearFactorGraph::shared_ptr deserializeGraph(const std::string& serialized_graph);
 
-std::string serializeGraphXML(const NonlinearFactorGraph& graph,
+GTSAM_EXPORT std::string serializeGraphXML(const NonlinearFactorGraph& graph,
     const std::string& name = "graph");
 
-NonlinearFactorGraph::shared_ptr deserializeGraphXML(const std::string& serialized_graph,
+GTSAM_EXPORT NonlinearFactorGraph::shared_ptr deserializeGraphXML(const std::string& serialized_graph,
     const std::string& name = "graph");
 
 
 // Serialize/Deserialize a Values
-std::string serializeValues(const Values& values);
+GTSAM_EXPORT std::string serializeValues(const Values& values);
 
-Values::shared_ptr deserializeValues(const std::string& serialized_values);
+GTSAM_EXPORT Values::shared_ptr deserializeValues(const std::string& serialized_values);
 
-std::string serializeValuesXML(const Values& values, const std::string& name = "values");
+GTSAM_EXPORT std::string serializeValuesXML(const Values& values, const std::string& name = "values");
 
-Values::shared_ptr deserializeValuesXML(const std::string& serialized_values,
+GTSAM_EXPORT Values::shared_ptr deserializeValuesXML(const std::string& serialized_values,
     const std::string& name = "values");
 
 // Serialize to/from files
@@ -40,21 +40,21 @@ Values::shared_ptr deserializeValuesXML(const std::string& serialized_values,
 // Filename arguments include path
 
 // Serialize
-bool serializeGraphToFile(const NonlinearFactorGraph& graph, const std::string& fname);
-bool serializeGraphToXMLFile(const NonlinearFactorGraph& graph,
+GTSAM_EXPORT bool serializeGraphToFile(const NonlinearFactorGraph& graph, const std::string& fname);
+GTSAM_EXPORT bool serializeGraphToXMLFile(const NonlinearFactorGraph& graph,
     const std::string& fname, const std::string& name = "graph");
 
-bool serializeValuesToFile(const Values& values, const std::string& fname);
-bool serializeValuesToXMLFile(const Values& values,
+GTSAM_EXPORT bool serializeValuesToFile(const Values& values, const std::string& fname);
+GTSAM_EXPORT bool serializeValuesToXMLFile(const Values& values,
     const std::string& fname, const std::string& name = "values");
 
 // Deserialize
-NonlinearFactorGraph::shared_ptr deserializeGraphFromFile(const std::string& fname);
-NonlinearFactorGraph::shared_ptr deserializeGraphFromXMLFile(const std::string& fname,
+GTSAM_EXPORT NonlinearFactorGraph::shared_ptr deserializeGraphFromFile(const std::string& fname);
+GTSAM_EXPORT NonlinearFactorGraph::shared_ptr deserializeGraphFromXMLFile(const std::string& fname,
     const std::string& name = "graph");
 
-Values::shared_ptr deserializeValuesFromFile(const std::string& fname);
-Values::shared_ptr deserializeValuesFromXMLFile(const std::string& fname,
+GTSAM_EXPORT Values::shared_ptr deserializeValuesFromFile(const std::string& fname);
+GTSAM_EXPORT Values::shared_ptr deserializeValuesFromXMLFile(const std::string& fname,
     const std::string& name = "values");
 
 } // \namespace gtsam