diff --git a/libavcodec/wavpack.h b/libavcodec/wavpack.h
index 053b1c575d..3ae601f914 100644
--- a/libavcodec/wavpack.h
+++ b/libavcodec/wavpack.h
@@ -177,7 +177,7 @@ static av_always_inline int wp_exp2(int16_t val)
     return neg ? -res : res;
 }
 
-static av_always_inline int wp_log2(int32_t val)
+static av_always_inline int wp_log2(uint32_t val)
 {
     int bits;