diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c7d2dae4ffa..002825312c3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2019-08-27  Christian Biesinger  <cbiesinger@google.com>
+
+	* nat/linux-namespaces.c (mnsh_main): Initialize fd (to -1).
+
 2019-08-27  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* cli/cli-utils.c (info_print_options_defs): Delete.
diff --git a/gdb/nat/linux-namespaces.c b/gdb/nat/linux-namespaces.c
index 503f755903c..e49bc1ade36 100644
--- a/gdb/nat/linux-namespaces.c
+++ b/gdb/nat/linux-namespaces.c
@@ -562,7 +562,7 @@ mnsh_main (int sock)
   while (1)
     {
       enum mnsh_msg_type type;
-      int fd, int1, int2;
+      int fd = -1, int1, int2;
       char buf[PATH_MAX];
       ssize_t size, response = -1;