diff --git a/src/channel.c b/src/channel.c
index d4ec60b..ba6e7ec 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -3061,7 +3061,7 @@
      * Only send "DETACH" for a netbeans channel.
      */
     if (channel->ch_nb_close_cb != NULL)
-	channel_save(channel, PART_OUT, (char_u *)DETACH_MSG_RAW,
+	channel_save(channel, PART_SOCK, (char_u *)DETACH_MSG_RAW,
 			      (int)STRLEN(DETACH_MSG_RAW), FALSE, "PUT ");
 
     /* When reading from stdout is not possible, assume the other side has