diff --git a/ddns-client/usr/lib/ddns-client/start_update b/ddns-client/usr/lib/ddns-client/start_update
index 3bc6195..86f938f 100644
--- a/ddns-client/usr/lib/ddns-client/start_update
+++ b/ddns-client/usr/lib/ddns-client/start_update
@@ -73,23 +73,23 @@ case "${NETWORK}" in
         if type ip >/dev/null 2>&1; then
           IP4_ADDRESS=$(/usr/bin/ip -4 addr show "${INTERFACE}" | /usr/bin/grep ---only-matching --perl-regexp '(?<=inet\s)\d+(\.\d+){3}')
         elif type ifconfig >/dev/null 2>&1; then
-          IP4_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet ' | /usr/bin/mawk '{print $2}')
+          IP4_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet ' | /usr/bin/awk '{print $2}')
         fi
       ;;
       IP6)
         if type ip >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --extended-regexp '^fd[0-9a-fA-F]{2}::')
+          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --extended-regexp '^fd[0-9a-fA-F]{2}::')
         elif type ifconfig >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep --extended-regexp 'inet6 (fd[0-9a-fA-F]{2}::|::1)' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}')
+          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep --extended-regexp 'inet6 (fd[0-9a-fA-F]{2}::|::1)' | /usr/bin/awk '{split($2,a,"/"); print a[1]}')
         fi
       ;;
       IP64)
         if type ip >/dev/null 2>&1; then
           IP4_ADDRESS=$(/usr/bin/ip -4 addr show "${INTERFACE}" | /usr/bin/grep ---only-matching --perl-regexp '(?<=inet\s)\d+(\.\d+){3}')
-          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --extended-regexp '^fd[0-9a-fA-F]{2}::')
+          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --extended-regexp '^fd[0-9a-fA-F]{2}::')
         elif type ifconfig >/dev/null 2>&1; then
-          IP4_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet ' | /usr/bin/mawk '{print $2}')
-          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep --extended-regexp 'inet6 (fd[0-9a-fA-F]{2}::|::1)' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}')
+          IP4_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet ' | /usr/bin/awk '{print $2}')
+          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep --extended-regexp 'inet6 (fd[0-9a-fA-F]{2}::|::1)' | /usr/bin/awk '{split($2,a,"/"); print a[1]}')
         fi
     esac
     ip_check
@@ -101,17 +101,17 @@ case "${NETWORK}" in
       ;;
       IP6)
         if type ip >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
+          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
         elif type ifconfig >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
+          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
         fi
       ;;
       IP64)
         IP4_ADDRESS=$(/usr/bin/wget --quiet --output-document='-' --timeout='3' --inet4-only --https-only --no-hsts 'ident.me')
         if type ip >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
+          IP6_ADDRESS=$(/usr/bin/ip -6 addr show "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
         elif type ifconfig >/dev/null 2>&1; then
-          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/mawk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
+          IP6_ADDRESS=$(/usr/sbin/ifconfig "${INTERFACE}" | /usr/bin/grep 'inet6' | /usr/bin/awk '{split($2,a,"/"); print a[1]}' | /usr/bin/grep --invert-match --extended-regexp '^(fd[0-9a-fA-F]{2}::|fe[0-9a-fA-F]{2}::)')
         fi
       ;;
     esac