diff --git a/apps/lib/util.asm b/apps/lib/util.asm
index df04d4f..0dda00f 100644
--- a/apps/lib/util.asm
+++ b/apps/lib/util.asm
@@ -9,9 +9,7 @@ isWS:
 ; Set Z if WS found, unset if end-of-string.
 toWS:
 	ld	a, (hl)
-	cp	' '
-	ret 	z
-	cp	0x09
+	call	isWS
 	ret	z
 	cp	0x01	; if a is null, carries and unsets z
 	ret	c