diff --git a/src/script/script_config.hpp b/src/script/script_config.hpp
--- a/src/script/script_config.hpp
+++ b/src/script/script_config.hpp
@@ -139,7 +139,7 @@ public:
 	/**
 	 * Randomize all settings the Script requested to be randomized.
 	 */
-	void AddRandomDeviation();
+	virtual void AddRandomDeviation();
 
 	/**
 	 * Is this config attached to an Script? In other words, is there a Script