diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp
index c438ece9c7f..549c7643d17 100644
--- a/lib/CodeGen/PrologEpilogInserter.cpp
+++ b/lib/CodeGen/PrologEpilogInserter.cpp
@@ -458,5 +458,7 @@ void PEI::replaceFrameIndices(MachineFunction &Fn) {
       if (RS) RS->forward(I);
     }
   }
+
+  delete RS;
 }