diff --git a/gdb/features/threads.dtd b/gdb/features/threads.dtd
new file mode 100644
index 0000000000..20308eeb71
--- /dev/null
+++ b/gdb/features/threads.dtd
@@ -0,0 +1,13 @@
+<!-- Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!ELEMENT threads (thread*)>
+<!ATTLIST threads version CDATA #FIXED "1.0">
+
+<!ELEMENT thread (#PCDATA)>
+
+<!ATTLIST thread id CDATA #REQUIRED>
+<!ATTLIST thread core CDATA #IMPLIED>