diff --git a/api/gutil.C b/api/gutil.C
index 71f3a7038b..5ffdd97499 100755
--- a/api/gutil.C
+++ b/api/gutil.C
@@ -26,7 +26,7 @@
 #include <windows.h>
 #include <GL/gl.h>
 #include <GL/glu.h>
-#include <glut.h>
+#include <GL/glut.h>
 #endif
 #ifdef __APPLE_CC__
 #include <OpenGL/gl.h>