diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index dc705dc968..f17ce42ddb 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-12  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
+
+	* nat/linux-osdata.c (linux_xfer_osdata_info_os_types): Forward
+	declare on one line to fix ARI warning.
+
 2018-12-12  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* infrun.c (infcall_suspend_state::infcall_suspend_state): New.
diff --git a/gdb/nat/linux-osdata.c b/gdb/nat/linux-osdata.c
index baca7fe94c..e690884dd8 100644
--- a/gdb/nat/linux-osdata.c
+++ b/gdb/nat/linux-osdata.c
@@ -1274,8 +1274,7 @@ linux_xfer_osdata_modules (struct buffer *buffer)
   buffer_grow_str0 (buffer, "</osdata>\n");
 }
 
-static void
-linux_xfer_osdata_info_os_types (struct buffer *buffer);
+static void linux_xfer_osdata_info_os_types (struct buffer *buffer);
 
 struct osdata_type {
   const char *type;