diff --git a/gas/doc/m680x0.m4 b/gas/doc/m680x0.m4
index 1a5dbaac984..a94856909a4 100644
--- a/gas/doc/m680x0.m4
+++ b/gas/doc/m680x0.m4
@@ -1,4 +1,5 @@
 _divert__(-1)
+_define__(<_GENERIC__>,<0>)
 _define__(<_M680X0__>,<1>)
 _define__(<_HOST__>,<Motorola 680x0>)
 _define__(<_MACH_DEP__>,<M68K-Dependent>)