diff --git a/plugins/lxc/lxc-multigraph b/plugins/lxc/lxc-multigraph
index f9521971..220e7bb4 100755
--- a/plugins/lxc/lxc-multigraph
+++ b/plugins/lxc/lxc-multigraph
@@ -120,8 +120,8 @@ function lxc_netdev {
 
    if [ -f "$lxcpath/$guest_name/config" ]; then
       # lxc 3 vs < 3
-      (egrep '^lxc.net.0.veth.pair' "$lxcpath/$guest_name/config" 2>/dev/null \
-         || egrep '^lxc.network.veth.pair' "$lxcpath/$guest_name/config"
+      (grep -EF '^lxc.net.0.veth.pair' "$lxcpath/$guest_name/config" 2>/dev/null \
+         || grep -EF '^lxc.network.veth.pair' "$lxcpath/$guest_name/config"
       ) | awk '{print $NF;}'
    fi
 }
@@ -361,8 +361,8 @@ do
       value_up="U"
       value_down="U"
    else
-      value_up=$(egrep "^ *${device}:" /proc/net/dev | awk '{print $10;}')
-      value_down=$(egrep "^ *${device}:" /proc/net/dev | awk '{print $2;}')
+      value_up=$(grep -E "^ *${device}:" /proc/net/dev | awk '{print $10;}')
+      value_down=$(grep -E "^ *${device}:" /proc/net/dev | awk '{print $2;}')
    fi
 
    cat <<EOF