diff --git a/content/smil/nsSMILAnimationFunction.h b/content/smil/nsSMILAnimationFunction.h
index b2f61478e4a..6fcc3b07cea 100644
--- a/content/smil/nsSMILAnimationFunction.h
+++ b/content/smil/nsSMILAnimationFunction.h
@@ -324,7 +324,6 @@ protected:
                      nsSMILValue& aResult, PRBool& aCanCacheSoFar) const;
   nsresult GetValues(const nsISMILAttr& aSMILAttr,
                      nsSMILValueArray& aResult);
-  void     UpdateValuesArray();
   void     CheckKeyTimes(PRUint32 aNumValues);
   void     CheckKeySplines(PRUint32 aNumValues);