diff --git a/llvm/lib/Target/ARM/ARMFrameLowering.cpp b/llvm/lib/Target/ARM/ARMFrameLowering.cpp
index 42a99d7b48434..a2ad626313294 100644
--- a/llvm/lib/Target/ARM/ARMFrameLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMFrameLowering.cpp
@@ -1011,7 +1011,7 @@ void ARMFrameLowering::emitEpilogue(MachineFunction &MF,
   }
 
   if (ReservedArgStack || IncomingArgStackToRestore) {
-    assert(ReservedArgStack + IncomingArgStackToRestore >= 0 &&
+    assert((int)ReservedArgStack + IncomingArgStackToRestore >= 0 &&
            "attempting to restore negative stack amount");
     emitSPUpdate(isARM, MBB, MBBI, dl, TII,
                  ReservedArgStack + IncomingArgStackToRestore,