diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
index 63ae62c42ee..699c42ee1f6 100644
--- a/mkspecs/features/qt_functions.prf
+++ b/mkspecs/features/qt_functions.prf
@@ -210,7 +210,7 @@ defineTest(qtPrepareTool) {
         qtAddTargetEnv($$1$$3, QT_TOOL.$${2}.depends, system)
     }
     $$1 = $$shell_path($$eval($$1))
-    qtAddTargetEnv($$1, QT_TOOL.$${2}.depends)
+    qtAddTargetEnv($$1, QT_TOOL.$${2}.depends, )
 }
 
 # target variable, list of env var names, [non-empty: prepare for system(), not make]