diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 0ab80de694a8cb..18ab62115b2e89 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -4848,7 +4848,7 @@ LegalizerHelper::narrowScalarFPTOI(MachineInstr &MI, unsigned TypeIdx,
   // out the result type. This is practically only useful for conversions from
   // half to at least 16-bits, so just handle the one case.
   if (SrcTy.getScalarType() != LLT::scalar(16) ||
-      NarrowTy.getScalarSizeInBits() < (IsSigned ? 17 : 16))
+      NarrowTy.getScalarSizeInBits() < (IsSigned ? 17u : 16u))
     return UnableToLegalize;
 
   Observer.changingInstr(MI);