diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index cc3bff1375..4f42489ccc 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -338,7 +338,7 @@ static int mpeg4_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
     }
     pc->frame_start_found= vop_found;
     pc->state= state;
-    return -1;
+    return END_NOT_FOUND;
 }
 
 /**
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 4e1375dcc2..5acce0d833 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3943,7 +3943,7 @@ static int find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
     }
     
     pc->state= state;
-    return -1;
+    return END_NOT_FOUND;
 }
 
 static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){