diff --git a/config/cfgroot/graphs.pl b/config/cfgroot/graphs.pl
index aba1ef0ef..8308d2443 100644
--- a/config/cfgroot/graphs.pl
+++ b/config/cfgroot/graphs.pl
@@ -493,8 +493,8 @@ sub updatevpngraph {
 		"--color=SHADEA".$color{"color19"},
 		"--color=SHADEB".$color{"color19"},
 		"--color=BACK".$color{"color21"},
-		"DEF:incoming=".$mainsettings{'RRDLOG'}."/collectd/localhost/openvpn-$interface/if_octets_derive.rrd:rx:AVERAGE",
-		"DEF:outgoing=".$mainsettings{'RRDLOG'}."/collectd/localhost/openvpn-$interface/if_octets_derive.rrd:tx:AVERAGE",
+		"DEF:incoming=".$mainsettings{'RRDLOG'}."/collectd/localhost/openvpn-$interface/if_octets.rrd:rx:AVERAGE",
+		"DEF:outgoing=".$mainsettings{'RRDLOG'}."/collectd/localhost/openvpn-$interface/if_octets.rrd:tx:AVERAGE",
 		"CDEF:outgoingn=outgoing,-1,*",
 		"COMMENT:".sprintf("%-20s",$Lang::tr{'caption'}),
 		"COMMENT:".sprintf("%15s",$Lang::tr{'maximal'}),