diff --git a/lib/Target/PIC16/PIC16InstrInfo.cpp b/lib/Target/PIC16/PIC16InstrInfo.cpp
index d70ebc649bb..33cb297ca0c 100644
--- a/lib/Target/PIC16/PIC16InstrInfo.cpp
+++ b/lib/Target/PIC16/PIC16InstrInfo.cpp
@@ -36,7 +36,7 @@ PIC16InstrInfo::PIC16InstrInfo(PIC16TargetMachine &tm)
 /// the source reg along with the FrameIndex of the loaded stack slot.  
 /// If not, return 0.  This predicate must return 0 if the instruction has
 /// any side effects other than storing to the stack slot.
-unsigned PIC16InstrInfo::isStoreToStackSlot(MachineInstr *MI,
+unsigned PIC16InstrInfo::isStoreToStackSlot(const MachineInstr *MI,
                                             int &FrameIndex) const {
   if (MI->getOpcode() == PIC16::movwf 
       && MI->getOperand(0).isReg()
@@ -52,7 +52,7 @@ unsigned PIC16InstrInfo::isStoreToStackSlot(MachineInstr *MI,
 /// the dest reg along with the FrameIndex of the stack slot.  
 /// If not, return 0.  This predicate must return 0 if the instruction has
 /// any side effects other than storing to the stack slot.
-unsigned PIC16InstrInfo::isLoadFromStackSlot(MachineInstr *MI,
+unsigned PIC16InstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
                                             int &FrameIndex) const {
   if (MI->getOpcode() == PIC16::movf 
       && MI->getOperand(0).isReg()
diff --git a/lib/Target/PIC16/PIC16InstrInfo.h b/lib/Target/PIC16/PIC16InstrInfo.h
index bd3e48858fe..98475dbaa3d 100644
--- a/lib/Target/PIC16/PIC16InstrInfo.h
+++ b/lib/Target/PIC16/PIC16InstrInfo.h
@@ -35,14 +35,16 @@ public:
   /// the destination along with the FrameIndex of the loaded stack slot.  If
   /// not, return 0.  This predicate must return 0 if the instruction has
   /// any side effects other than loading from the stack slot.
-  virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
+  virtual unsigned isLoadFromStackSlot(const MachineInstr *MI, 
+                                       int &FrameIndex) const;
                                                                                
   /// isStoreToStackSlot - If the specified machine instruction is a direct
   /// store to a stack slot, return the virtual or physical register number of
   /// the source reg along with the FrameIndex of the loaded stack slot.  If
   /// not, return 0.  This predicate must return 0 if the instruction has
   /// any side effects other than storing to the stack slot.
-  virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
+  virtual unsigned isStoreToStackSlot(const MachineInstr *MI, 
+                                      int &FrameIndex) const;
 
   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MBBI,