diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 937aef119e..2606b401a8 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -267,7 +267,7 @@ static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc,
     int bit;
 
     if (s->extra_bits) {
-        S <<= s->extra_bits;
+        S *= 1 << s->extra_bits;
 
         if (s->got_extra_bits &&
             get_bits_left(&s->gb_extra_bits) >= s->extra_bits) {