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-rw-r--r--progs/trivial/line-cull.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/progs/trivial/line-cull.c b/progs/trivial/line-cull.c
index 8999a8f0b1..038004b4c4 100644
--- a/progs/trivial/line-cull.c
+++ b/progs/trivial/line-cull.c
@@ -118,7 +118,7 @@ int main(int argc, char **argv)
glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
- type = GLUT_RGB;
+ type = GLUT_RGB | GLUT_ALPHA;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
glutInitDisplayMode(type);