diff --git a/utils/pkgs/ykfde/scripts/ykfde_enroll b/utils/pkgs/ykfde/scripts/ykfde_enroll
index 95cd7cb..6da32f2 100755
--- a/utils/pkgs/ykfde/scripts/ykfde_enroll
+++ b/utils/pkgs/ykfde/scripts/ykfde_enroll
@@ -16,11 +16,11 @@ YKFDE_ITERATIONS=1000000
 YKFDE_STORAGE=/boot/crypt-storage/default
 
 
-YKFDE_SLOT_CHECK="$(ykinfo -q -"$YKFDE_CHALLENGE_SLOT")"
-[ "$DBG" ] && printf '%s\n' " > YubiKey slot status 'ykinfo -q -$YKFDE_CHALLENGE_SLOT': $YKFDE_SLOT_CHECK"
+YKFDE_SLOT_CHECK="$(ykinfo -q -"$YKFDE_SLOT")"
+[ "$DBG" ] && printf '%s\n' " > YubiKey slot status 'ykinfo -q -$YKFDE_SLOT': $YKFDE_SLOT_CHECK"
 
 if [ "$YKFDE_SLOT_CHECK" != 1 ]; then
-  printf '%s\n' "ERROR: Chosen YubiKey slot '$YKFDE_CHALLENGE_SLOT' isn't configured. Please choose slot configured for 'HMAC-SHA1 Challenge-Response' mode in '/etc/ykfde.conf'"
+  printf '%s\n' "ERROR: Chosen YubiKey slot '$YKFDE_SLOT' isn't configured. Please choose slot configured for 'HMAC-SHA1 Challenge-Response' mode in '/etc/ykfde.conf'"
   exit 1
 fi