diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 3fcc000efc53..4fa21f7e2308 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -334,7 +334,7 @@ sclp_dispatch_evbufs(struct sccb_header *sccb)
 			reg->receiver_fn(evbuf);
 			spin_lock_irqsave(&sclp_lock, flags);
 		} else if (reg == NULL)
-			rc = -ENOSYS;
+			rc = -EOPNOTSUPP;
 	}
 	spin_unlock_irqrestore(&sclp_lock, flags);
 	return rc;
diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c
index 4be63be73445..3b13d58fe87b 100644
--- a/drivers/s390/char/sclp_rw.c
+++ b/drivers/s390/char/sclp_rw.c
@@ -463,7 +463,7 @@ sclp_emit_buffer(struct sclp_buffer *buffer,
 		/* Use write priority message */
 		sccb->msg_buf.header.type = EVTYP_PMSGCMD;
 	else
-		return -ENOSYS;
+		return -EOPNOTSUPP;
 	buffer->request.command = SCLP_CMDW_WRITE_EVENT_DATA;
 	buffer->request.status = SCLP_REQ_FILLED;
 	buffer->request.callback = sclp_writedata_callback;