diff --git a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index d83567c8854..679d3c4a85b 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -461,7 +461,7 @@ void ARMELFStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
   const MCRegisterInfo &MRI = getContext().getRegisterInfo();
   for (size_t i = 0; i < RegList.size(); ++i) {
     unsigned Reg = MRI.getEncodingValue(RegList[i]);
-    assert(Reg < (IsVector ? 32 : 16) && "Register out of range");
+    assert(Reg < (IsVector ? 32U : 16U) && "Register out of range");
     unsigned Bit = (1u << Reg);
     if ((Mask & Bit) == 0) {
       Mask |= Bit;