diff --git a/cmake/QtTargetHelpers.cmake b/cmake/QtTargetHelpers.cmake
index 09babe5876c..74044ec1661 100644
--- a/cmake/QtTargetHelpers.cmake
+++ b/cmake/QtTargetHelpers.cmake
@@ -24,12 +24,12 @@ function(qt_internal_extend_target target)
         set(dbus_sources "")
         foreach(adaptor ${arg_DBUS_ADAPTOR_SOURCES})
             qt_create_qdbusxml2cpp_command("${target}" "${adaptor}" ADAPTOR BASENAME "${arg_DBUS_ADAPTOR_BASENAME}" FLAGS "${arg_DBUS_ADAPTOR_FLAGS}")
-            list(APPEND dbus_sources "${sources}")
+            list(APPEND dbus_sources "${adaptor}")
         endforeach()
 
         foreach(interface ${arg_DBUS_INTERFACE_SOURCES})
             qt_create_qdbusxml2cpp_command("${target}" "${interface}" INTERFACE BASENAME "${arg_DBUS_INTERFACE_BASENAME}" FLAGS "${arg_DBUS_INTERFACE_FLAGS}")
-            list(APPEND dbus_sources "${sources}")
+            list(APPEND dbus_sources "${interface}")
         endforeach()
 
         get_target_property(target_type ${target} TYPE)