diff --git a/src/backends/redis/script_manager.cpp b/src/backends/redis/script_manager.cpp
index 1e86f54..ba1fb0d 100644
--- a/src/backends/redis/script_manager.cpp
+++ b/src/backends/redis/script_manager.cpp
@@ -19,13 +19,13 @@
 #include "helpers/lexical_cast.hpp"
 #include "command.hpp"
 #include <cassert>
-#if defined(WITH_CRYPTOPP)
+#if defined(MAKE_SHA1_WITH_CRYPTOPP)
 #	include <crypto++/sha.h>
 #endif
 
 namespace redis {
 	namespace {
-#if defined(WITH_CRYPTOPP)
+#if defined(MAKE_SHA1_WITH_CRYPTOPP)
 		struct LuaScriptHash {
 			union {
 				struct {
@@ -44,7 +44,7 @@ namespace redis {
 		assert(m_command);
 	}
 
-#if defined(WITH_CRYPTOPP)
+#if defined(MAKE_SHA1_WITH_CRYPTOPP)
 	boost::string_ref ScriptManager::add_lua_script_ifn (const std::string& parScript) {
 		assert(m_command->is_connected());
 
diff --git a/src/backends/redis/script_manager.hpp b/src/backends/redis/script_manager.hpp
index 5cec852..39fe4c9 100644
--- a/src/backends/redis/script_manager.hpp
+++ b/src/backends/redis/script_manager.hpp
@@ -19,8 +19,11 @@
 #define id8E124FF76DF449CDB8FBA806F8EF4E78
 
 #include "redisConfig.h"
-#include <boost/utility/string_ref.hpp>
 #if defined(WITH_CRYPTOPP)
+#	define MAKE_SHA1_WITH_CRYPTOPP
+#endif
+#include <boost/utility/string_ref.hpp>
+#if defined(MAKE_SHA1_WITH_CRYPTOPP)
 #	include <set>
 #else
 #	include <map>
@@ -44,7 +47,7 @@ namespace redis {
 		boost::string_ref add_lua_script_ifn ( const std::string& parScript );
 
 		Command* m_command;
-#if defined(WITH_CRYPTOPP)
+#if defined(MAKE_SHA1_WITH_CRYPTOPP)
 		std::set<Sha1Array> m_known_hashes;
 #else
 		std::map<std::string, Sha1Array> m_known_scripts;