diff --git a/src/Contacts/Contact.m b/src/Contacts/Contact.m
index 2434dac45..717de82c3 100644
--- a/src/Contacts/Contact.m
+++ b/src/Contacts/Contact.m
@@ -162,7 +162,7 @@ NS_ASSUME_NONNULL_BEGIN
           }
       }
     }];
-    return identifiers;
+    return [identifiers copy];
 }
 
 + (NSComparator)comparatorSortingNamesByFirstThenLast:(BOOL)firstNameOrdering {