diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 6baba7255b6..ce13945583e 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2175,6 +2175,7 @@ void DwarfDebug::collectVariableInfo(const MachineFunction *MF) {
         DbgVariable *ArgVar = new DbgVariable(DV, MInsn, NULL);
         CurrentFnDbgScope->addVariable(ArgVar);
         DbgValueStartMap[MInsn] = ArgVar;
+        Processed.insert(DV);
         continue;
       }