diff --git a/include/support/win32/limits_win32.h b/include/support/win32/limits_win32.h
index a1fad20ec..406cd3025 100644
--- a/include/support/win32/limits_win32.h
+++ b/include/support/win32/limits_win32.h
@@ -72,7 +72,7 @@
 #define __builtin_nans(__dummy)  _Snan._Double
 #define __builtin_nansf(__dummy) _FSnan._Float
 #define __builtin_nansl(__dummy) _LSnan._Long_double
-#endif ! defined(__clang__)
+#endif // ! defined(__clang__)
 
 #endif // _LIBCPP_MSVCRT