diff --git a/src/shared/proparser/qmakeglobals.cpp b/src/shared/proparser/qmakeglobals.cpp
index a50fa5437a0..04ff561e9d6 100644
--- a/src/shared/proparser/qmakeglobals.cpp
+++ b/src/shared/proparser/qmakeglobals.cpp
@@ -135,7 +135,7 @@ QMakeGlobals::ArgumentReturn QMakeGlobals::addCommandLineArguments(
             if (arg.startsWith(QLatin1Char('-'))) {
                 if (arg == QLatin1String("--")) {
                     state.extraargs = args.mid(*pos + 1);
-                    *pos = args.size();
+                    args.erase(args.begin() + *pos, args.end());
                     return ArgumentsOk;
                 }
                 if (arg == QLatin1String("-after"))
diff --git a/src/shared/proparser/qmakeglobals.h b/src/shared/proparser/qmakeglobals.h
index 90e2b007ccd..7e9cf09281d 100644
--- a/src/shared/proparser/qmakeglobals.h
+++ b/src/shared/proparser/qmakeglobals.h
@@ -101,7 +101,7 @@ public:
     QProcessEnvironment environment;
 #endif
     QString qmake_abslocation;
-    QStringList qmake_args;
+    QStringList qmake_args, qmake_extra_args;
 
     QString qtconf;
     QString qmakespec, xqmakespec;