diff --git a/llvm/unittests/Support/ProgramTest.cpp b/llvm/unittests/Support/ProgramTest.cpp
index 886ead8..3926ceb 100644
--- a/llvm/unittests/Support/ProgramTest.cpp
+++ b/llvm/unittests/Support/ProgramTest.cpp
@@ -87,6 +87,7 @@
       EXPECT_TRUE(convStatus);
       return EnvStorage.back().c_str();
 #else
+      (void)this;
       return Var;
 #endif
     };