diff --git a/optional.hpp b/optional.hpp
index c5b0e6e..57c6b74 100644
--- a/optional.hpp
+++ b/optional.hpp
@@ -28,13 +28,17 @@
 #define TL_OPTIONAL_GCC49
 #endif
 
+#if (defined(__GNUC__) && __GNUC__ == 5 && __GNUC_MINOR__ <= 4)
+#define TL_OPTIONAL_GCC54 1
+#else
+#define TL_OPTIONAL_GCC54 2
+#endif
+
 template <int> struct TC;
 TC<__GNUC__> debug_1;
 TC<__GNUC_MINOR__> debug_2;
+TC<TL_OPTIONAL_GCC54> debug_3;
 
-#if (defined(__GNUC__) && __GNUC__ == 5 && __GNUC_MINOR__ <= 4)
-#define TL_OPTIONAL_GCC54
-#endif
 
 #if (defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ <= 9)
 #define TL_OPTIONAL_NO_CONSTRR