diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 5c45b4b..f2ce130 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -23,7 +23,7 @@
 
   IsLittleEndian = TD.isLittleEndian();
   PointerTy = getValueType(TD.getIntPtrType());
-  memset(UnsupportedOps, 0, ISD::BUILTIN_OP_END*sizeof(short));
+  memset(UnsupportedOps, 0, 128*sizeof(short));
   memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*));
 }