diff --git a/configure.pri b/configure.pri
index 76bb27e4ae4..83c0dee141d 100644
--- a/configure.pri
+++ b/configure.pri
@@ -1041,7 +1041,7 @@ defineTest(qtConfOutput_gccSysroot) {
 defineTest(qtConfOutput_qmakeArgs) {
     !$${2}: return()
 
-    $${currentConfig}.output.privatePro = "!host_build|!cross_compile {"
+    $${currentConfig}.output.privatePro += "!host_build|!cross_compile {"
     for (a, config.input.qmakeArgs) {
         $${currentConfig}.output.privatePro += "    $$a"
         EXTRA_QMAKE_ARGS += $$system_quote($$a)