diff --git a/include/fmt/base.h b/include/fmt/base.h
index 93b73559..b24f33a6 100644
--- a/include/fmt/base.h
+++ b/include/fmt/base.h
@@ -65,10 +65,10 @@
 #endif
 #ifdef _MSVC_STL_UPDATE
 #  define FMT_MSVC_STL_UPDATE _MSVC_STL_UPDATE
-#elif defined(_MSC_VER) && _MSC_VER < 1912 // VS 15.5
-#    define FMT_MSVC_STL_UPDATE _MSVC_LANG
+#elif defined(_MSC_VER) && _MSC_VER < 1912  // VS 15.5
+#  define FMT_MSVC_STL_UPDATE _MSVC_LANG
 #else
-#    define FMT_MSVC_STL_UPDATE 0
+#  define FMT_MSVC_STL_UPDATE 0
 #endif
 
 // Detect __has_*.