diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index c78862354f..1daf0e5f71 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -55,7 +55,7 @@ AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms)
     pic->free = avfilter_default_free_video_buffer;
     avpicture_alloc((AVPicture *)pic, pic->format, ref->w, ref->h);
 
-    memcpy(ref->data, pic->data, sizeof(int *) * 4);
+    memcpy(ref->data, pic->data, sizeof(uint8_t *) * 4);
     memcpy(ref->linesize, pic->linesize, sizeof(int *) * 4);
 
     return ref;