diff --git a/lisp/international/iso-transl.el b/lisp/international/iso-transl.el
index 029d94708b0..e2fdd9e4eeb 100644
--- a/lisp/international/iso-transl.el
+++ b/lisp/international/iso-transl.el
@@ -127,6 +127,7 @@
     ("*c"   . [162])("c"   . [162])
     ("*o"   . [176])("o"   . [176])
     ("*u"   . [181])("u"   . [181])
+    ("*m"   . [181])("m"   . [181])
     ("*x"   . [215])("x"   . [215])
     ("*|"   . [166])("|"   . [166])
     ("~A"   . [195])