diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index f6389aad96bf8..4af0d2f089c23 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -9307,7 +9307,7 @@ static bool shouldLowerTailCallStackArg(const MachineFunction &MF,
       if (CallOffset != MFI.getObjectOffset(FI))
         return true;
       uint64_t SizeInBits = LoadNode->getMemoryVT().getFixedSizeInBits();
-      if (SizeInBits / 8 != MFI.getObjectSize(FI))
+      if (SizeInBits / 8 != static_cast<uint64_t>(MFI.getObjectSize(FI)))
         return true;
       return false;
     }