diff --git a/math/vtk5/Makefile b/math/vtk5/Makefile
index 14d4aa4ed6de..32d2fd80fc22 100644
--- a/math/vtk5/Makefile
+++ b/math/vtk5/Makefile
@@ -64,7 +64,7 @@ SHARED_CMAKE_BOOL+=	VTK_USE_SYSTEM_${lib}
 
 VTKMPEG2_CMAKE_BOOL=	VTK_USE_PATENTED VTK_USE_MPEG2_ENCODER
 THEORA_CMAKE_BOOL=	VTK_USE_OGGTHEORA_ENCODER
-GL2PS_CMAKE_BOOL=	GTK_USE_GL2PS
+GL2PS_CMAKE_BOOL=	VTK_USE_GL2PS
 OSMESA_CMAKE_BOOL=	VTK_OPENGL_HAS_OSMESA
 OSMESA_CMAKE_BOOL_OFF=	VTK_USE_X
 QT4_CMAKE_BOOL=		VTK_USE_GUISUPPORT