diff --git a/src/core/js/edit_mode.js b/src/core/js/edit_mode.js
index afb3da9289b163cacc5b957ead181879cbcb58c1..1a2c9092c2b6d234cc52691089c7094e93c49a2a 100644
--- a/src/core/js/edit_mode.js
+++ b/src/core/js/edit_mode.js
@@ -1044,7 +1044,7 @@ var edit_mode = new function () {
                             }
                         });
                         // Add input for manual ID insertion
-                        idinput = $("<input type='number' class='caosdb-f-manual-id-insert' value=''></input>")
+                        var idinput = $("<input type='number' class='caosdb-f-manual-id-insert' value=''></input>")
                         idinput.hide()
                         // Add callback for pressing Enter: the insertion is completed
                         idinput.on('keyup', function (e) {