diff --git a/progs/tests/cva.c b/progs/tests/cva.c
index ed965e748a5..bde4c6c827e 100644
--- a/progs/tests/cva.c
+++ b/progs/tests/cva.c
@@ -17,7 +17,7 @@
 #endif
 #define GL_GLEXT_LEGACY
 #include <GL/glut.h>
-
+#include <GL/glext.h>
 
 GLfloat verts[][4] = {
    { -0.5, -0.5, -2.0, 0.0 },