Windows compatibility

diff --git a/src/VTKViewer/VTKViewer_OpenGLHelper.h b/src/VTKViewer/VTKViewer_OpenGLHelper.h
index 3a6c9d43417a0fb6664c6ad286f886059047b8e8..4dd55b8f83567825df06b609f43b679fba3976eb 100644 (file)
--- a/src/VTKViewer/VTKViewer_OpenGLHelper.h
+++ b/src/VTKViewer/VTKViewer_OpenGLHelper.h
@@ -24,6 +24,10 @@
 #include <vtkMatrix4x4.h>
 #include "VTKViewer.h"
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 #include <GL/gl.h>