Index: src/connection_base.cxx
===================================================================
--- src/connection_base.cxx	(revision 1561)
+++ src/connection_base.cxx	(working copy)
@@ -855,6 +855,7 @@
     }
 
     // Prepare for new definition of parameters
+	i->second.registered = false;
     i->second.parameters.clear();
     i->second.varargs = false;
     i->second.complete = false;