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-rw-r--r--progs/redbook/feedback.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/progs/redbook/feedback.c b/progs/redbook/feedback.c
index 4981854d95..cc685d55d3 100644
--- a/progs/redbook/feedback.c
+++ b/progs/redbook/feedback.c
@@ -143,6 +143,8 @@ void display(void)
size = glRenderMode (GL_RENDER);
printBuffer (size, feedBuffer);
+
+ glFinish();
}
/* ARGSUSED1 */