diff --git a/qmake/generators/mac/pbuilder_pbx.cpp b/qmake/generators/mac/pbuilder_pbx.cpp
index f03dce2bc40..e06a1145926 100644
--- a/qmake/generators/mac/pbuilder_pbx.cpp
+++ b/qmake/generators/mac/pbuilder_pbx.cpp
@@ -873,6 +873,7 @@ ProjectBuilderMakefileGenerator::writeMakeParts(QTextStream &t)
           << "\t\t\t" << writeSettings("shellScript", "make -C " + IoUtils::shellQuoteUnix(Option::output_dir)
                                                       + " -f " + IoUtils::shellQuoteUnix(mkfile)) << ";\n"
           << "\t\t\t" << writeSettings("showEnvVarsInLog", "0") << ";\n"
+          << "\t\t\t" << writeSettings("alwaysOutOfDate", "1") << ";\n"
           << "\t\t};\n";
    }