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-rw-r--r--progs/demos/isosurf.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c
index b7c151586c..1ee738d17a 100644
--- a/progs/demos/isosurf.c
+++ b/progs/demos/isosurf.c
@@ -35,6 +35,7 @@
#endif
#define GL_GLEXT_LEGACY
#include "GL/glut.h"
+#include "GL/glext.h"
#include "readtex.c" /* I know, this is a hack. KW: me too. */
#define TEXTURE_FILE "../images/reflect.rgb"