diff --git a/rage/rlMetric.hpp b/rage/rlMetric.hpp
index 8c5dfbb..79dea88 100644
--- a/rage/rlMetric.hpp
+++ b/rage/rlMetric.hpp
@@ -12,6 +12,8 @@ namespace rage
 
         virtual int _0x10() { return 0; }; // returns a constant integer
 
+        virtual int _0x18() { return 0; };
+
         virtual const char* get_name() { return ""; };
 
         virtual bool serialize(void* serializer) { return false; };