diff --git a/entrypoint.sh b/entrypoint.sh
index a02a3ad..d50bf21 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -25,7 +25,6 @@ if [[ ! -d /etc/ldap/slapd.d || "$SLAPD_FORCE_RECONFIGURE" == "true" ]]; then
         exit 1
     fi
 
-    SLAPD_PPOLICY_DN_PREFIX="${SLAPD_PPOLICY_DN_PREFIX:-cn=default,ou=policies}"
     SLAPD_ORGANIZATION="${SLAPD_ORGANIZATION:-${SLAPD_DOMAIN}}"
     cp -a /etc/ldap.dist/* /etc/ldap
 
@@ -78,13 +77,15 @@ EOF
         IFS=","; declare -a modules=($SLAPD_ADDITIONAL_MODULES)
 
         for module in "${modules[@]}"; do
-             moduleFile="/etc/ldap/modules/${module}.ldif"
+             module_file="/etc/ldap/modules/${module}.ldif"
 
              if [ "$module" == 'ppolicy' ]; then
-               sed -i'' "s|\(olcPPolicyDefault: \)PPOLICY_DN|\1${SLAPD_PPOLICY_DN_PREFIX}$dc_string|" $moduleFile
+                 SLAPD_PPOLICY_DN_PREFIX="${SLAPD_PPOLICY_DN_PREFIX:-cn=default,ou=policies}"
+
+                 sed -i "s/\(olcPPolicyDefault: \)PPOLICY_DN/\1${SLAPD_PPOLICY_DN_PREFIX}$dc_string/g" $module_file
              fi
 
-             slapadd -n0 -F /etc/ldap/slapd.d -l "$moduleFile" >/dev/null 2>&1
+             slapadd -n0 -F /etc/ldap/slapd.d -l "$module_file" >/dev/null 2>&1
         done
     fi