diff --git a/lib/Target/AArch64/AArch64FastISel.cpp b/lib/Target/AArch64/AArch64FastISel.cpp
index adcb64d191c..58a4fd16b61 100644
--- a/lib/Target/AArch64/AArch64FastISel.cpp
+++ b/lib/Target/AArch64/AArch64FastISel.cpp
@@ -487,7 +487,7 @@ bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr, Type *Ty)
           NumBytes = 0;
       }
 
-      if (NumBytes != (1U << Val))
+      if (NumBytes != (1ULL << Val))
         break;
 
       Addr.setShift(Val);