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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 0710bc6047b..10f94b6ace2 100644
--- a/progs/demos/isosurf.c
+++ b/progs/demos/isosurf.c
@@ -1042,6 +1042,7 @@ int main(int argc, char **argv)
read_surface( "isosurf.dat" );
+ glutInit( &argc, argv);
glutInitWindowPosition(0, 0);
glutInitWindowSize(400, 400);