diff --git a/src/channel.c b/src/channel.c
index d621798..811d87a 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -465,7 +465,7 @@
 	val = 0;
 	ioctlsocket(sd, FIONBIO, &val);
 #else
-	fcntl(sd, F_SETFL, 0);
+	(void)fcntl(sd, F_SETFL, 0);
 #endif
     }
 
@@ -1474,6 +1474,9 @@
     return ret;
 }
 
+/*
+ * Mark references to lists used in channels.
+ */
     int
 set_ref_in_channel(int copyID)
 {