1 files changed, 3 insertions, 2 deletions
diff --git a/lib/wmemcmp-impl.h b/lib/wmemcmp-impl.h
index 2b8125fe26..6148220de7 100644
--- a/lib/wmemcmp-impl.h
+++ b/lib/wmemcmp-impl.h
@@ -27,8 +27,9 @@ wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n)
           n--;
           continue;
         }
-      /* Note that wc1 and wc2 each have at most 31 bits.  */
-      return (int)wc1 - (int)wc2;
+      /* ISO C requires wmemcmp to work with all wchar_t values.
+         We cannot assume that wc1 and wc2 are in the range 0..INT_MAX.  */
+      return _GL_CMP (wc1, wc2);
              /* > 0 if wc1 > wc2, < 0 if wc1 < wc2.  */
     }
   return 0;