diff --git a/enum.h b/enum.h
index dc0c79c..23a4904 100644
--- a/enum.h
+++ b/enum.h
@@ -937,9 +937,11 @@ operator >>(std::basic_istream<Char, Traits>& stream, Enum &value)             \
 #if defined(_MSC_VER) && _MSC_VER >= 1700
 // VS 2012 and above fully support strongly typed enums and will warn about
 // incorrect usage.
-#   define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying)
+#   define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
+        BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying)
 #else
-#   define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
+#   define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
+        BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
 #endif
 
 // C++98, C++11