diff --git a/llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.cpp b/llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.cpp
index 02a425044c757a..d364eb9d3996d9 100644
--- a/llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.cpp
@@ -67,7 +67,7 @@ bool PPCFunctionInfo::isLiveInZExt(Register VReg) const {
 
 void PPCFunctionInfo::appendParameterType(ParamType Type) {
   uint32_t CopyParamType = ParameterType;
-  unsigned Bits = 0;
+  int Bits = 0;
 
   // If it is fixed type, we only need to increase the FixedParamNum, for
   // the bit encode of fixed type is bit of zero, we do not need to change the