diff --git a/sprout/config/compiler/clang.hpp b/sprout/config/compiler/clang.hpp
index 5b19d686..b5d0fc0b 100644
--- a/sprout/config/compiler/clang.hpp
+++ b/sprout/config/compiler/clang.hpp
@@ -44,7 +44,7 @@
 #	define SPROUT_NO_CXX11_UNICODE_LITERALS
 #endif
 
-#if (!__has_feature(cxx_constexpr) || __cplusplus < 201305L)
+#if (!__has_feature(cxx_constexpr) || __cplusplus < 201305L || __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 4))
 #	define SPROUT_NO_CXX14_CONSTEXPR
 #endif
 
diff --git a/sprout/config/compiler/gcc.hpp b/sprout/config/compiler/gcc.hpp
index e6294faf..3c744e55 100644
--- a/sprout/config/compiler/gcc.hpp
+++ b/sprout/config/compiler/gcc.hpp
@@ -52,8 +52,6 @@
 #	define SPROUT_HAS_CONSTEXPR_BIT_OPERATION
 #endif
 
-#if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 9) || __cplusplus < 201300L)
-#	define SPROUT_NO_CXX14_CONSTEXPR
-#endif
+#define SPROUT_NO_CXX14_CONSTEXPR
 
 #endif	// #ifndef SPROUT_CONFIG_COMPILER_GCC_HPP