diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index f2da7307c4..34e33553f7 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -81,7 +81,7 @@ static void sd_1d53(int *p, int i0, int i1)
 
     if (i1 <= i0 + 1) {
         if (i0 == 1)
-            p[1] <<= 1;
+            p[1] *= 2;
         return;
     }