diff --git a/lib/Target/AMDGPU/AMDGPUISelLowering.h b/lib/Target/AMDGPU/AMDGPUISelLowering.h
index 478b2035fd7..1ce391e9816 100644
--- a/lib/Target/AMDGPU/AMDGPUISelLowering.h
+++ b/lib/Target/AMDGPU/AMDGPUISelLowering.h
@@ -216,7 +216,7 @@ public:
 
   /// \brief Helper function that returns the byte offset of the given
   /// type of implicit parameter.
-  unsigned getImplicitParameterOffset(const AMDGPUMachineFunction *MFI,
+  uint32_t getImplicitParameterOffset(const AMDGPUMachineFunction *MFI,
                                       const ImplicitParameter Param) const;
 };