diff --git a/src/nupic/math/SegmentMatrixAdapter.hpp b/src/nupic/math/SegmentMatrixAdapter.hpp
index 5174b848aa..1bfbb96d60 100644
--- a/src/nupic/math/SegmentMatrixAdapter.hpp
+++ b/src/nupic/math/SegmentMatrixAdapter.hpp
@@ -30,6 +30,7 @@
 #include <algorithm>
 #include <nupic/types/Types.hpp>
 #include <vector>
+#include <nupic/utils/Log.hpp> // NTA_ASSERT
 
 namespace nupic {