diff --git a/src/dict.c b/src/dict.c
index 57619c280..13c185253 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -768,7 +768,7 @@ dictEntry *dictGetFairRandomKey(dict *d) {
 static unsigned long rev(unsigned long v) {
     unsigned long s = CHAR_BIT * sizeof(v); // bit size; must be power of 2
     unsigned long mask = ~0UL;
-    while ((s >>= 1) > 0UL) {
+    while ((s >>= 1) > 0) {
         mask ^= (mask << s);
         v = ((v >> s) & mask) | ((v << s) & ~mask);
     }