diff --git a/src/Lanceur.Core/BusinessLogic/AliasQueryResultMixin.cs b/src/Lanceur.Core/BusinessLogic/AliasQueryResultMixin.cs
index beacf87b..7f4627b1 100644
--- a/src/Lanceur.Core/BusinessLogic/AliasQueryResultMixin.cs
+++ b/src/Lanceur.Core/BusinessLogic/AliasQueryResultMixin.cs
@@ -45,7 +45,7 @@ public static IEnumerable<AliasQueryResult> CloneFromSynonyms(this AliasQueryRes
 
             if (errors.Any()) throw new AggregateException($"Errors occured while updating synonyms of alias with these synonyms: {alias.Synonyms}", errors);
 
-            return results;
+            return results.ToList();
         }
 
         #endregion Methods
diff --git a/src/Lanceur/Views/KeywordsViewModel.cs b/src/Lanceur/Views/KeywordsViewModel.cs
index c2836052..acbdd510 100644
--- a/src/Lanceur/Views/KeywordsViewModel.cs
+++ b/src/Lanceur/Views/KeywordsViewModel.cs
@@ -253,7 +253,7 @@ private void AfterSaveOrUpdateAlias(QueryResult updated)
                                                    .Add("TypeOfQueryResult", updated.GetType())
                                                    .BeginScope();
                 // Remove all synonyms ... 
-                var toDel = Aliases.Where(a => a.Id == updated.Id);
+                var toDel = Aliases.Where(a => a.Id == updated.Id).ToList();
                 Aliases.Remove(toDel);
 
                 // ... and recreate them
@@ -262,7 +262,9 @@ private void AfterSaveOrUpdateAlias(QueryResult updated)
 
                 // Sort and display selected alias
                 Aliases.SortCollection(criterion => criterion.Name);
-                SelectedAlias = updatedAlias;
+                SelectedAlias = Aliases.Where(a=>a.Id == updated.Id)
+                                       .Cast<AliasQueryResult>()
+                                       .FirstOrDefault() ;
             }
             catch(Exception ex)
             {