diff --git a/stepmania/src/ThemeManager.cpp b/stepmania/src/ThemeManager.cpp
index 05ec9df0ec..c9e7facdac 100644
--- a/stepmania/src/ThemeManager.cpp
+++ b/stepmania/src/ThemeManager.cpp
@@ -956,7 +956,7 @@ void ThemeManager::PushMetric( Lua *L, const RString &sClassName, const RString
 	else
 	{
 		LuaHelpers::PrepareExpression( sValue );
-		LuaHelpers::RunExpression( L, sValue );
+		LuaHelpers::RunExpression( L, sValue, ssprintf("%s::%s", sClassName.c_str(), sValueName.c_str()) );
 	}
 }