diff --git a/FHEM/14_CUL_WS.pm b/FHEM/14_CUL_WS.pm
index d5e4762d8..d09ba1178 100644
--- a/FHEM/14_CUL_WS.pm
+++ b/FHEM/14_CUL_WS.pm
@@ -60,7 +60,6 @@ CUL_WS_Define($$)
   $hash->{corr3} = ((int(@a) > 5) ? $a[5] : 0);
   $hash->{corr4} = ((int(@a) > 6) ? $a[6] : 0);
   $modules{CUL_WS}{defptr}{$a[2]} = $hash;
-  AssignIoPort($hash);
   return undef;
 }
 
diff --git a/fhem.pl b/fhem.pl
index 96e6bdc5d..6b8ef3ebb 100755
--- a/fhem.pl
+++ b/fhem.pl
@@ -2197,9 +2197,7 @@ AssignIoPort($;$)
     }
   }
   if($hash->{IODev}) {
-    # See CUL_WS_Attr() for details
-    $attr{$hn}{IODev} = $hash->{IODev}{NAME}
-      if($hasIODevAttr && $hash->{TYPE} ne "CUL_WS");
+    $attr{$hn}{IODev} = $hash->{IODev}{NAME} if($hasIODevAttr);
 
   } else {
     if($init_done) {
@@ -3997,6 +3995,7 @@ Dispatch($$;$$)
             return undef;
 
           }
+          delete($hash->{".clientArray"});
         }
       }
     }