diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp
index 6197430b39f..d73dd3d757e 100644
--- a/lib/CodeGen/RegisterScavenging.cpp
+++ b/lib/CodeGen/RegisterScavenging.cpp
@@ -50,6 +50,8 @@ void RegScavenger::enterBasicBlock(MachineBasicBlock *mbb) {
   }
 
   MBB = mbb;
+  ScavengedReg = 0;
+  ScavengedRC = NULL;
 
   // All registers started out unused.
   RegStates.set();