diff --git a/fhem/FHEM/00_HMUARTLGW.pm b/fhem/FHEM/00_HMUARTLGW.pm
index 400e26a77..a83a2170b 100644
--- a/fhem/FHEM/00_HMUARTLGW.pm
+++ b/fhem/FHEM/00_HMUARTLGW.pm
@@ -14,6 +14,7 @@ package main;
 use strict;
 use warnings;
 
+use DevIo;
 use Digest::MD5;
 use Time::HiRes qw(gettimeofday time);
 use Time::Local;
@@ -136,8 +137,6 @@ sub HMUARTLGW_Initialize($)
 {
 	my ($hash) = @_;
 
-	require "$attr{global}{modpath}/FHEM/DevIo.pm";
-
 	$hash->{ReadyFn}   = "HMUARTLGW_Ready";
 	$hash->{ReadFn}    = "HMUARTLGW_Read";
 	$hash->{WriteFn}   = "HMUARTLGW_Write";