diff --git a/libavutil/common.h b/libavutil/common.h
index 2777cea9f9bba..92b721a59c48d 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -371,7 +371,7 @@ static av_always_inline av_const double av_clipd_c(double a, double amin, double
  */
 static av_always_inline av_const int av_ceil_log2_c(int x)
 {
-    return av_log2((x - 1) << 1);
+    return av_log2((x - 1U) << 1);
 }
 
 /**