diff --git a/llvm/include/llvm/IR/Instructions.h b/llvm/include/llvm/IR/Instructions.h
index 9c253a1a6bf2..3908f9ee5384 100644
--- a/llvm/include/llvm/IR/Instructions.h
+++ b/llvm/include/llvm/IR/Instructions.h
@@ -3150,7 +3150,7 @@ public:
       assert(((unsigned)Index == DefaultPseudoIndex ||
               (unsigned)Index < SI->getNumCases()) &&
              "Index out the number of cases.");
-      return Index != DefaultPseudoIndex ? Index + 1 : 0;
+      return (unsigned)Index != DefaultPseudoIndex ? Index + 1 : 0;
     }
 
     Self &operator+=(ptrdiff_t N) {