diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 085b6153698..1f823ca533e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-11-03  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* doublest.c (convert_doublest_to_floatformat): Fix uninitialized
+	output when converting a zero value to a special byteorder format.
+
 2017-11-02  Yao Qi  <yao.qi@linaro.org>
 
 	* frame.c (do_frame_register_read): Remove aspace.
diff --git a/gdb/doublest.c b/gdb/doublest.c
index fe9fc23d711..ef98dde8cbd 100644
--- a/gdb/doublest.c
+++ b/gdb/doublest.c
@@ -387,7 +387,7 @@ convert_doublest_to_floatformat (const struct floatformat *fmt,
     }
 
   if (dfrom == 0)
-    return;			/* Result is zero */
+    goto finalize_byteorder;	/* Result is zero */
   if (dfrom != dfrom)		/* Result is NaN */
     {
       /* From is NaN */