diff --git a/gui/m291/src/m291.tal b/gui/m291/src/m291.tal
index bdef5b0..7b5c484 100644
--- a/gui/m291/src/m291.tal
+++ b/gui/m291/src/m291.tal
@@ -388,9 +388,11 @@
 	&done NIP2 LTH POP2r JMP2r
 
 @sort-folders ( -- )
+	.lines/folders LDZ ?{ JMP2r }
 	;mem/folders DUP2 LIT2 [ 00 -lines/folders ] LDZ #01 SUB #70 SFT2 ADD2 !sort-tracks-0
 
 @sort-tracks ( -- )
+	.lines/tracks LDZ ?{ JMP2r }
 	;mem/tracks DUP2 LIT2 [ 00 -lines/tracks ] LDZ #01 SUB #70 SFT2 ADD2
 	( >> )