diff --git a/src/instances.cc b/src/instances.cc
index 2e8be0de..05d14690 100644
--- a/src/instances.cc
+++ b/src/instances.cc
@@ -45,7 +45,9 @@ Group::Group( Config::Group const & cfgGroup,
     }
   }
   for ( const auto & dictId : dictOrderList ) {
-    dictionaries.push_back( groupDicts[ dictId ] );
+    if ( groupDicts.contains( dictId ) ) {
+      dictionaries.push_back( groupDicts[ dictId ] );
+    }
   }
 }
 
diff --git a/src/ui/mainwindow.cc b/src/ui/mainwindow.cc
index 81bda91e..bb3cec96 100644
--- a/src/ui/mainwindow.cc
+++ b/src/ui/mainwindow.cc
@@ -1652,8 +1652,8 @@ void MainWindow::updateDictionaryBar()
     if ( currentId == Instances::Group::AllGroupId )
       dictionaryBar.setMutedDictionaries( &cfg.mutedDictionaries );
     else {
-      Config::Group * grp = cfg.getGroup( currentId );
-      dictionaryBar.setMutedDictionaries( grp ? &grp->mutedDictionaries : nullptr );
+      Config::Group * _grp = cfg.getGroup( currentId );
+      dictionaryBar.setMutedDictionaries( _grp ? &_grp->mutedDictionaries : nullptr );
     }
 
     dictionaryBar.setDictionaries( grp->dictionaries );