1 files changed, 2 insertions, 0 deletions
diff --git a/progs/tests/invert.c b/progs/tests/invert.c
index 750592ed79..63099fbd22 100644
--- a/progs/tests/invert.c
+++ b/progs/tests/invert.c
@@ -35,6 +35,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 #include "readtex.h"
@@ -186,6 +187,7 @@ int main( int argc, char *argv[] )
    glutInitWindowSize( Width, Height );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
    glutCreateWindow( "GL_MESA_pack_invert test" );
+   glewInit();
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutDisplayFunc( Display );