diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index a862927936..0d63736007 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -206,7 +206,7 @@ void ff_svq3_add_idct_c(uint8_t *dst, int16_t *block,
     int i;
 
     if (dc) {
-        dc       = 13 * 13 * (dc == 1 ? 1538 * block[0]
+        dc       = 13 * 13 * (dc == 1 ? 1538U* block[0]
                                       : qmul * (block[0] >> 3) / 2);
         block[0] = 0;
     }