diff --git a/lib/Target/MSP430/MSP430RegisterInfo.cpp b/lib/Target/MSP430/MSP430RegisterInfo.cpp
index da3ba05a1c4..566d9028d48 100644
--- a/lib/Target/MSP430/MSP430RegisterInfo.cpp
+++ b/lib/Target/MSP430/MSP430RegisterInfo.cpp
@@ -270,10 +270,10 @@ MSP430RegisterInfo::processFunctionBeforeFrameFinalized(MachineFunction &MF)
                                                                          const {
   // Create a frame entry for the FPW register that must be saved.
   if (hasFP(MF)) {
-    int FrameIdx = MF.getFrameInfo()->CreateFixedObject(2, -4, true, false);
+    int ATTRIBUTE_UNUSED FrameIdx =
+      MF.getFrameInfo()->CreateFixedObject(2, -4, true, false);
     assert(FrameIdx == MF.getFrameInfo()->getObjectIndexBegin() &&
            "Slot for FPW register must be last in order to be found!");
-    FrameIdx = 0;
   }
 }