diff --git a/Layout/default/Linework/Index.php b/Layout/default/Linework/Index.php
index 7adee780d..14d661e0a 100644
--- a/Layout/default/Linework/Index.php
+++ b/Layout/default/Linework/Index.php
@@ -610,13 +610,19 @@ function validateWorkflowItem(id) {
     
     console.log("abschlusstyp: " + $("#wfitem_abschlusstyp_" + id).val());
     console.log("ist abschlusstyp: " + $("#wfitem_ist_abschlusstyp_" + id).val());
-    if($("#wfitem_ist_abschlusstyp_" + id).val() == "SC/APC in FTU") {
+    if($("#wfitem_abschlusstyp_" + id).val() == "SC/APC in FTU") {
       required_fields["inhouse_cabling_supplied"] = "bool";
       required_fields["inhouse_cabling_deployed"] = "bool";
-    } else if($("#wfitem_abschlusstyp_" + id).val() == "SC/APC in FTU") {
-      required_fields["inhouse_cabling_supplied"] = "bool";
-      required_fields["inhouse_cabling_deployed"] = "bool";
-    }    
+    }
+    if($("#wfitem_ist_abschlusstyp_" + id).val().length) {
+      if($("#wfitem_ist_abschlusstyp_" + id).val() == "SC/APC in FTU") {
+        required_fields["inhouse_cabling_supplied"] = "bool";
+        required_fields["inhouse_cabling_deployed"] = "bool";
+      } else {
+        delete required_fields["inhouse_cabling_supplied"];
+        delete required_fields["inhouse_cabling_deployed"];
+      }
+    }
     
     var missing = false;
     for(var field1 in required_fields) {