diff --git a/src/app/qgsattributesformproperties.cpp b/src/app/qgsattributesformproperties.cpp
index 049f2b28d68..9b69fd74064 100644
--- a/src/app/qgsattributesformproperties.cpp
+++ b/src/app/qgsattributesformproperties.cpp
@@ -354,7 +354,8 @@ void QgsAttributesFormProperties::loadAttributeRelationEdit()
 
     QgsRelation relation = QgsProject::instance()->relationManager()->relation( currentItem->data( 0, FieldNameRole ).toString() );
 
-    Q_FOREACH ( const QgsRelation &nmrel, QgsProject::instance()->relationManager()->referencingRelations( relation.referencingLayer() ) )
+    const QList<QgsRelation> relations = QgsProject::instance()->relationManager()->referencingRelations( relation.referencingLayer() );
+    for ( const QgsRelation &nmrel : relations )
     {
       if ( nmrel.fieldPairs().at( 0 ).referencingField() != relation.fieldPairs().at( 0 ).referencingField() )
         mAttributeRelationEdit->setCardinalityCombo( QStringLiteral( "%1 (%2)" ).arg( nmrel.referencedLayer()->name(), nmrel.fieldPairs().at( 0 ).referencedField() ), nmrel.id() );