diff --git a/format.h b/format.h
index ce0d6594..14bfdaca 100644
--- a/format.h
+++ b/format.h
@@ -50,6 +50,12 @@
 namespace fmt {
 namespace internal {
 # pragma intrinsic(_BitScanReverse)
+inline uint32_t builtin_clz(uint32_t x) {
+  unsigned long r = 0;
+  _BitScanReverse(&r, x);
+  return 31 - r;
+}
+# define FMT_BUILTIN_CLZ(n) fmt::internal::builtin_clz(n)
 # ifdef _WIN64
 #  pragma intrinsic(_BitScanReverse64)
 inline uint32_t builtin_clzll(uint64_t n) {
@@ -59,12 +65,6 @@ inline uint32_t builtin_clzll(uint64_t n) {
 }
 # define FMT_BUILTIN_CLZLL(n) fmt::internal::builtin_clzll(n)
 # endif
-inline uint32_t builtin_clz(uint32_t x) {
-  unsigned long r = 0;
-  _BitScanReverse(&r, x);
-  return 31 - r;
-}
-# define FMT_BUILTIN_CLZ(n) fmt::internal::builtin_clz(n)
 }
 }
 #endif