diff --git a/c64/kernal/iec_release_atn.s b/c64/kernal/iec_release_atn.s
index b10ac67a..56644746 100644
--- a/c64/kernal/iec_release_atn.s
+++ b/c64/kernal/iec_release_atn.s
@@ -1,5 +1,5 @@
 iec_release_atn:
 	lda $dd00
 	and #$f7
-	sta $dd0
+	sta $dd00
 	rts