diff --git a/qt4/src/lib/qpluginwidget/qpluginwidget.cpp b/qt4/src/lib/qpluginwidget/qpluginwidget.cpp
index 4c600ebee..72f0f4539 100644
--- a/qt4/src/lib/qpluginwidget/qpluginwidget.cpp
+++ b/qt4/src/lib/qpluginwidget/qpluginwidget.cpp
@@ -33,6 +33,7 @@ const char *config = " \
         <service name=\"RAM\"/> \
         <service name=\"RM\"/> \
         <service name=\"ROM\"/> \
+        <service name=\"SIGNAL\"/> \
         <service name=\"Timer\"/> \
         <service name=\"Nitpicker\"/> \
     </parent-provides> \