diff --git a/gas/doc/a29k.m4 b/gas/doc/a29k.m4
index 48ae61a1c7..cf3ba386c2 100644
--- a/gas/doc/a29k.m4
+++ b/gas/doc/a29k.m4
@@ -1,4 +1,5 @@
 _divert__(-1)
 _define__(<_AMD29K__>,<1>)
+_define__(<_HOST__>,<AMD 29K>)
 _define__(<_MACH_DEP__>,<AMD29K Dependent>
 _divert__<>
\ No newline at end of file