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-rw-r--r--video/filter/vf_flip.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/video/filter/vf_flip.c b/video/filter/vf_flip.c
index 30658e48dd..776f127fa1 100644
--- a/video/filter/vf_flip.c
+++ b/video/filter/vf_flip.c
@@ -27,6 +27,11 @@
#include "video/out/vo.h"
+#include "config.h"
+#if !HAVE_GPL
+#error GPL only
+#endif
+
static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
{
mp_image_vflip(mpi);