diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89114566a..67a71d468 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -249,7 +249,7 @@ include_directories(BEFORE
 
 if(MSVC)
 	add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
-	add_definitions(/wd4251 /wd4275 /wd4251 /wd4661) # Disable non-DLL-exported base class and other warnings
+	add_definitions(/wd4251 /wd4275 /wd4251 /wd4661 /wd4344) # Disable non-DLL-exported base class and other warnings
 endif()
 
 if(GTSAM_ENABLE_CONSISTENCY_CHECKS)
diff --git a/examples/TimeTBB.cpp b/examples/TimeTBB.cpp
index a513916b7..077331848 100644
--- a/examples/TimeTBB.cpp
+++ b/examples/TimeTBB.cpp
@@ -81,7 +81,7 @@ map<int, double> testWithoutMemoryAllocation()
     tbb::parallel_for(tbb::blocked_range<size_t>(0, numberOfProblems), WorkerWithoutAllocation(results));
     tbb::tick_count t1 = tbb::tick_count::now();
     cout << "Without memory allocation, grain size = " << grainSize << ", time = " << (t1 - t0).seconds() << endl;
-    timingResults[grainSize] = (t1 - t0).seconds();
+    timingResults[(int)grainSize] = (t1 - t0).seconds();
   }
 
   return timingResults;
diff --git a/gtsam/base/treeTraversal/parallelTraversalTasks.h b/gtsam/base/treeTraversal/parallelTraversalTasks.h
index 7e294643a..7986f9534 100644
--- a/gtsam/base/treeTraversal/parallelTraversalTasks.h
+++ b/gtsam/base/treeTraversal/parallelTraversalTasks.h
@@ -120,7 +120,7 @@ namespace gtsam {
 
                 // If we have child tasks, start subtasks and wait for them to complete
                 //postOrderTask.set_ref_count((int) treeNode->children.size());
-                set_ref_count(treeNode->children.size());
+                set_ref_count((int)treeNode->children.size());
                 spawn(childTasks);
                 return firstChild;
               }