diff --git a/llvm/unittests/ADT/APIntTest.cpp b/llvm/unittests/ADT/APIntTest.cpp
index 0755a8c..f5f6594 100644
--- a/llvm/unittests/ADT/APIntTest.cpp
+++ b/llvm/unittests/ADT/APIntTest.cpp
@@ -2507,7 +2507,7 @@
 
 TEST(APIntTest, MultiplicativeInverseExaustive) {
   for (unsigned BitWidth = 1; BitWidth <= 16; ++BitWidth) {
-    for (unsigned Value = 0; Value < (1 << BitWidth); ++Value) {
+    for (unsigned Value = 0; Value < (1u << BitWidth); ++Value) {
       APInt V = APInt(BitWidth, Value);
       APInt MulInv =
           V.zext(BitWidth + 1)