diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index 7327587..503dcae 100644
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -78,7 +78,7 @@
     virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
     virtual SDNode *ExpandOperationResult(SDNode *N, SelectionDAG &DAG);
         
-    SDOperand PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
+    virtual SDOperand PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
     
     virtual const char *getTargetNodeName(unsigned Opcode) const;