module name with .

[J K]

Hi, 
is this a bug? 

Erlang R13B01 (erts-5.7.2) [smp:2:2] [rq:2] [async-threads:0] 

Eshell V5.7.2  (abort with ^G) 

4> c('fm2.2').       
fm2.2.beam: Module name 'fm2.2' does not match file name 'fm2.2' 
error 
5> 

i have: 
-module('fm2.2'). 

BR 
Johan