diff --git a/tests/auto/profilewriter/profilewriter.qbs b/tests/auto/profilewriter/profilewriter.qbs
index 03de7d00d37..ba420c4817f 100644
--- a/tests/auto/profilewriter/profilewriter.qbs
+++ b/tests/auto/profilewriter/profilewriter.qbs
@@ -25,4 +25,5 @@ QtcAutotest {
         files: "tst_profilewriter.cpp"
     }
     cpp.includePaths: base.concat([proParserGroup.prefix])
+    cpp.defines: base.concat("QT_USE_FAST_OPERATOR_PLUS")
 }