diff --git a/sprout/functional/hash/sscrisk/cel/utility.hpp b/sprout/functional/hash/sscrisk/cel/utility.hpp
new file mode 100644
index 00000000..3fe729b5
--- /dev/null
+++ b/sprout/functional/hash/sscrisk/cel/utility.hpp
@@ -0,0 +1,16 @@
+#ifndef SPROUT_FUNCTIONAL_HASH_SSCRISK_CEL_UTILITY_HPP
+#define SPROUT_FUNCTIONAL_HASH_SSCRISK_CEL_UTILITY_HPP
+
+#include <cstddef>
+#include <sprout/config.hpp>
+#include <sprout/functional/hash/hash.hpp>
+#include <sscrisk/cel/utility.hpp>
+
+namespace sprout {
+	template<typename T1, typename T2>
+	SPROUT_CONSTEXPR std::size_t hash_value(sscrisk::cel::pair<T1, T2> const& v) {
+		return sprout::hash_combine(sprout::hash_combine(0, v.first), v.second);
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_FUNCTIONAL_HASH_SSCRISK_CEL_UTILITY_HPP
diff --git a/sprout/user_config.hpp b/sprout_user_config.hpp
similarity index 100%
rename from sprout/user_config.hpp
rename to sprout_user_config.hpp
diff --git a/user_config.hpp b/user_config.hpp
deleted file mode 100644
index c0a86f4e..00000000
--- a/user_config.hpp
+++ /dev/null
@@ -1,4 +0,0 @@
-
-//#define SPROUT_CONFIG_DISABLE_CONSTEXPR
-//#define SPROUT_CONFIG_DISABLE_NOEXCEPT
-//#define SPROUT_CONFIG_USE_SSCRISK_CEL