diff --git a/unittests/Support/ProcessTest.cpp b/unittests/Support/ProcessTest.cpp
index 19694e55d06..f4060720961 100644
--- a/unittests/Support/ProcessTest.cpp
+++ b/unittests/Support/ProcessTest.cpp
@@ -43,7 +43,7 @@ TEST(ProcessTest, GetRandomNumberTest) {
   const unsigned r1 = Process::GetRandomNumber();
   const unsigned r2 = Process::GetRandomNumber();
   // It should be extremely unlikely that both r1 and r2 are 0.
-  EXPECT_NE((r1 | r2), 0);
+  EXPECT_NE((r1 | r2), 0u);
 }
 
 #ifdef _MSC_VER