diff --git a/libavformat/segafilmenc.c b/libavformat/segafilmenc.c
index 812d0ad64e947..d721ec38fa90d 100644
--- a/libavformat/segafilmenc.c
+++ b/libavformat/segafilmenc.c
@@ -70,7 +70,7 @@ static int film_write_packet_to_header(AVFormatContext *format_context, FILMPack
         info2 = pkt->duration;
         /* The top bit being set indicates a key frame */
         if (!pkt->keyframe)
-            info1 |= (1 << 31);
+            info1 |= 1U << 31;
     }
 
     /* Write the 16-byte sample info packet to the STAB chunk in the header */