diff --git a/openvdb_cmd/vdb_view/RenderModules.cc b/openvdb_cmd/vdb_view/RenderModules.cc
index 01912f8e3f..6c49fd1917 100644
--- a/openvdb_cmd/vdb_view/RenderModules.cc
+++ b/openvdb_cmd/vdb_view/RenderModules.cc
@@ -14,6 +14,13 @@
 #include <openvdb/util/Assert.h>
 
 #if defined(_WIN32)
+// GL/glu.h requires APIENTRY and CALLBACK from windows.h. GL/glew.h only defines
+// them temporarily (undefining them at the end of the header), so windows.h must
+// be included before GL/glu.h rather than relying on a transitive include.
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
 #include <GL/glu.h>
 #endif