diff --git a/dracut.cmdline.7.xml b/dracut.cmdline.7.xml
index 8a49056f..9357e25a 100644
--- a/dracut.cmdline.7.xml
+++ b/dracut.cmdline.7.xml
@@ -464,7 +464,6 @@ This parameter can be specified multiple times.</para>
           <term><envar>ifname=</envar><replaceable>&lt;interface&gt;</replaceable>:<replaceable>&lt;MAC&gt;</replaceable></term>
           <listitem>
             <para>Assign network device name &lt;interface&gt; (ie eth0) to the NIC with MAC &lt;MAC&gt;.
-Note letters in the MAC-address must be lowercase!
 <remark>Note: If you use this option you <emphasis remap="B">must</emphasis> specify an ifname= argument for all interfaces used in ip= or fcoe= arguments.</remark>
 This parameter can be specified multiple times.</para>
           </listitem>
diff --git a/modules.d/40network/parse-ifname.sh b/modules.d/40network/parse-ifname.sh
index 4c3c70e4..26e6084d 100755
--- a/modules.d/40network/parse-ifname.sh
+++ b/modules.d/40network/parse-ifname.sh
@@ -25,7 +25,8 @@ parse_ifname_opts() {
     case $# in
         7)
             ifname_if=$1
-            ifname_mac=$2:$3:$4:$5:$6:$7
+            # udev requires MAC addresses to be lower case
+            ifname_mac=`echo $2:$3:$4:$5:$6:$7 | tr '[:upper:]' '[:lower:]'`
             ;;
         *)
             die "Invalid arguments for ifname="