diff --git a/Sources/OpenVDB/include/openvdb/math/Operators.h b/Sources/OpenVDB/include/openvdb/math/Operators.h
index 7f9f9238..023ae102 100644
--- a/Sources/OpenVDB/include/openvdb/math/Operators.h
+++ b/Sources/OpenVDB/include/openvdb/math/Operators.h
@@ -6,10 +6,10 @@
 #ifndef OPENVDB_MATH_OPERATORS_HAS_BEEN_INCLUDED
 #define OPENVDB_MATH_OPERATORS_HAS_BEEN_INCLUDED
 
-#include "math/FiniteDifference.h"
-#include "math/Stencils.h"
-#include "math/Maps.h"
-#include "math/Transform.h"
+#include "openvdb/math/FiniteDifference.h"
+#include "openvdb/math/Stencils.h"
+#include "openvdb/math/Maps.h"
+#include "openvdb/math/Transform.h"
 #include <cmath> // for std::sqrt()
 
 
diff --git a/Sources/OpenVDB/include/openvdb/math/Ray.h b/Sources/OpenVDB/include/openvdb/math/Ray.h
index a4ec0665..66cae4a1 100644
--- a/Sources/OpenVDB/include/openvdb/math/Ray.h
+++ b/Sources/OpenVDB/include/openvdb/math/Ray.h
@@ -10,9 +10,9 @@
 #ifndef OPENVDB_MATH_RAY_HAS_BEEN_INCLUDED
 #define OPENVDB_MATH_RAY_HAS_BEEN_INCLUDED
 
-#include "math/Math.h"
-#include "math/Vec3.h"
-#include "math/Transform.h"
+#include "openvdb/math/Math.h"
+#include "openvdb/math/Vec3.h"
+#include "openvdb/math/Transform.h"
 #include <algorithm> // for std::swap()
 #include <iostream> // for std::ostream
 #include <limits> // for std::numeric_limits<Type>::max()