diff --git a/include/fmt/format.h b/include/fmt/format.h
index 38820e3c..e8e50871 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -151,7 +151,7 @@
 // Some compilers masquerade as both MSVC and GCC-likes or otherwise support
 // __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
 // MSVC intrinsics if the clz and clzll builtins are not available.
-#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL)
+#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED)
 # include <intrin.h>  // _BitScanReverse, _BitScanReverse64
 
 namespace fmt {