diff --git a/PPI/Setup.hh b/PPI/Setup.hh
index 7c4c217e3b96f8495913ff8e3cb3c343cf69445a..1c42c0e9fc9dd93689adf01322eca798fdc2f80c 100644
--- a/PPI/Setup.hh
+++ b/PPI/Setup.hh
@@ -62,7 +62,7 @@ namespace ppi {
         
         \see \ref ppi_connections
      */
-    void connect(connector::Connector & source, connector::Connector & target, ...);
+    void connect(connector::OutputConnector & source, connector::InputConnector & target, ...);
 
 #else