diff --git a/ChangeLog b/ChangeLog
index c2d13f1dc8..2e13d668a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-03  Phil Blundell  <pb@pbcl.net>
+
+	* inet/netinet/in.h (struct ip_mreq_source): Correct misplaced
+	comments.
+
 2017-05-03  Carlos O'Donell  <carlos@redhat.com>
 
 	[BZ #20116]
diff --git a/inet/netinet/in.h b/inet/netinet/in.h
index 365bc6878e..e064188721 100644
--- a/inet/netinet/in.h
+++ b/inet/netinet/in.h
@@ -275,10 +275,10 @@ struct ip_mreq_source
     /* IP multicast address of group.  */
     struct in_addr imr_multiaddr;
 
-    /* IP address of source.  */
+    /* IP address of interface.  */
     struct in_addr imr_interface;
 
-    /* IP address of interface.  */
+    /* IP address of source.  */
     struct in_addr imr_sourceaddr;
   };
 #endif