diff --git a/debian/bareos-director.postinst.in b/debian/bareos-director.postinst.in
index 7339617a0dc..36e5eba818d 100644
--- a/debian/bareos-director.postinst.in
+++ b/debian/bareos-director.postinst.in
@@ -45,7 +45,7 @@ case "$1" in
         fi
         permissions
         # on Univention distributions the ucr command allows to open the firewall
-        if [ -x "/etc/init.d/univention-firewall" ] && type ucr >/dev/null 2>&1; then
+        if [ -x "/etc/init.d/univention-firewall" ] && which ucr >/dev/null 2>&1; then
             ucr set \
                 security/packetfilter/package/bareos-director/tcp/@dir_port@/all="ACCEPT" \
                 security/packetfilter/package/bareos-director/tcp/@dir_port@/all/en="bareos-dir"
diff --git a/debian/bareos-filedaemon.postinst.in b/debian/bareos-filedaemon.postinst.in
index 5dbdde2b0d2..5c01d088cfa 100644
--- a/debian/bareos-filedaemon.postinst.in
+++ b/debian/bareos-filedaemon.postinst.in
@@ -47,7 +47,7 @@ case "$1" in
         fi
         permissions
         # on Univention distributions the ucr command allows to open the firewall
-        if [ -x "/etc/init.d/univention-firewall" ] && type ucr >/dev/null 2>&1; then
+        if [ -x "/etc/init.d/univention-firewall" ] && which ucr >/dev/null 2>&1; then
             ucr set \
                 security/packetfilter/package/bareos-filedaemon/tcp/@fd_port@/all="ACCEPT" \
                 security/packetfilter/package/bareos-filedaemon/tcp/@fd_port@/all/en="bareos-fd"
diff --git a/debian/bareos-storage.postinst.in b/debian/bareos-storage.postinst.in
index 4b9cad3a4ff..5cc38b6e153 100644
--- a/debian/bareos-storage.postinst.in
+++ b/debian/bareos-storage.postinst.in
@@ -50,7 +50,7 @@ case "$1" in
         permissions
         /usr/lib/bareos/scripts/bareos-config setup_sd_user
         # on Univention distributions the ucr command allows to open the firewall
-        if [ -x "/etc/init.d/univention-firewall" ] && type ucr >/dev/null 2>&1; then
+        if [ -x "/etc/init.d/univention-firewall" ] && which ucr >/dev/null 2>&1; then
             ucr set \
                 security/packetfilter/package/bareos-storage/tcp/@sd_port@/all="ACCEPT" \
                 security/packetfilter/package/bareos-storage/tcp/@sd_port@/all/en="bareos-sd"