diff --git a/src/redisassert.h b/src/redisassert.h
index dd7920554..a3f95da09 100644
--- a/src/redisassert.h
+++ b/src/redisassert.h
@@ -43,7 +43,7 @@
 #define assert(_e) (likely((_e))?(void)0 : (_serverAssert(#_e,__FILE__,__LINE__),redis_unreachable()))
 #define panic(...) _serverPanic(__FILE__,__LINE__,__VA_ARGS__),redis_unreachable()
 
-void _serverAssert(char *estr, char *file, int line);
+void _serverAssert(const char *estr, const char *file, int line);
 void _serverPanic(const char *file, int line, const char *msg, ...);
 
 #endif