diff --git a/libavfilter/vf_shuffleplanes.c b/libavfilter/vf_shuffleplanes.c
index 8ca1b8bf00..7085b150ee 100644
--- a/libavfilter/vf_shuffleplanes.c
+++ b/libavfilter/vf_shuffleplanes.c
@@ -34,7 +34,7 @@ typedef struct ShufflePlanesContext {
     int planes;
 
     /* mapping indices */
-    uint8_t map[4];
+    int map[4];
 
     /* set to 1 if some plane is used more than once, so we need to make a copy */
     int copy;