diff --git a/booking.rooms_admin.inc b/booking.rooms_admin.inc
index 61a8a72..3da20e9 100644
--- a/booking.rooms_admin.inc
+++ b/booking.rooms_admin.inc
@@ -432,7 +432,7 @@ function booking_rooms_definition_form_validate($form, $form_state) {
 	//make sure room number is numerical
 	$values = $form_state['input'];
 
-	if (! is_numeric($values['booking_room_number'])) {
+	if ((! is_numeric($values['booking_room_number'])) && $form_state['values']['op'] != 'Delete Room') {
 		form_set_error('booking_room_number', t('Room number must be numeric. If you need to use a more descriptive label, please use the room label field.'));
 		watchdog('booking_debug', "<pre>Room definition submission:\n@info</pre>", array('@info' => print_r( $form_state, true)));
 	}