diff --git a/c64/kernal/second.s b/c64/kernal/second.s
index 65eb7f88..09ff93bb 100644
--- a/c64/kernal/second.s
+++ b/c64/kernal/second.s
@@ -1,3 +1,6 @@
 ; Function defined on pp272-273 of C64 Programmers Reference Guide
 second:
-	rts
+
+	;; This trivial routine is documented in 'C64 Programmer's Reference Guide', page 296
+	ora $60
+	jmp iec_tx_byte