fix #73 Upgrade to 1.1.5 startup issues with cfssl-helper
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a72019..a7be0ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## 1.1.6
+Fix :
+  - Upgrade to 1.1.5 startup issues with cfssl-helper #73
 
 Update to light-baseimage:0.2.5
 
diff --git a/image/service/slapd/startup.sh b/image/service/slapd/startup.sh
index fce861f..b5a0959 100755
--- a/image/service/slapd/startup.sh
+++ b/image/service/slapd/startup.sh
@@ -132,6 +132,13 @@
 
     log-helper debug "Check previous TLS certificates..."
 
+    # fix for #73
+    # image started with an existing database/config created before 1.1.5
+    [[ -z "$PREVIOUS_LDAP_TLS_CA_CRT_PATH" ]] && PREVIOUS_LDAP_TLS_CA_CRT_PATH="${CONTAINER_SERVICE_DIR}/slapd/assets/certs/$LDAP_TLS_CA_CRT_FILENAME"
+    [[ -z "$PREVIOUS_LDAP_TLS_CRT_PATH" ]] && PREVIOUS_LDAP_TLS_CRT_PATH="${CONTAINER_SERVICE_DIR}/slapd/assets/certs/$LDAP_TLS_CRT_FILENAME"
+    [[ -z "$PREVIOUS_LDAP_TLS_KEY_PATH" ]] && PREVIOUS_LDAP_TLS_KEY_PATH="${CONTAINER_SERVICE_DIR}/slapd/assets/certs/$LDAP_TLS_KEY_FILENAME"
+    [[ -z "$PREVIOUS_LDAP_TLS_DH_PARAM_PATH" ]] && PREVIOUS_LDAP_TLS_DH_PARAM_PATH="${CONTAINER_SERVICE_DIR}/slapd/assets/certs/dhparam.pem"
+
     ssl-helper $LDAP_SSL_HELPER_PREFIX $PREVIOUS_LDAP_TLS_CRT_PATH $PREVIOUS_LDAP_TLS_KEY_PATH $PREVIOUS_LDAP_TLS_CA_CRT_PATH
     [ -f ${PREVIOUS_LDAP_TLS_DH_PARAM_PATH} ] || openssl dhparam -out ${LDAP_TLS_DH_PARAM_PATH} 2048