diff --git a/llvm/lib/Target/R600/SIInsertWaits.cpp b/llvm/lib/Target/R600/SIInsertWaits.cpp
index d31da4585ffe..ba202e3cbf63 100644
--- a/llvm/lib/Target/R600/SIInsertWaits.cpp
+++ b/llvm/lib/Target/R600/SIInsertWaits.cpp
@@ -98,7 +98,8 @@ public:
   SIInsertWaits(TargetMachine &tm) :
     MachineFunctionPass(ID),
     TII(0),
-    TRI(0) { }
+    TRI(0),
+    ExpInstrTypesSeen(0) { }
 
   virtual bool runOnMachineFunction(MachineFunction &MF);