diff --git a/lib/resource.txt b/lib/resource.txt
index 7efe2c0..5e88bb1 100755
--- a/lib/resource.txt
+++ b/lib/resource.txt
@@ -79,6 +79,17 @@
 # By default field mode is disabled.
 ${FIELD_MODE}               ${False}
 
+# LDAP related variables.
+${LDAP_BASE_DN}             ${EMPTY}
+${LDAP_BIND_DN}             ${EMPTY}
+${LDAP_SERVER_HOST}         ${EMPTY}
+${LDAP_SECURE_MODE}         ${EMPTY}
+${LDAP_BIND_DN_PASSWORD}    ${EMPTY}
+${LDAP_SEARCH_SCOPE}        ${EMPTY}
+${LDAP_TYPE}                ${EMPTY}
+${LDAP_USER}                ${EMPTY}
+${LDAP_USER_PASSWORD}       ${EMPTY}
+
 *** Keywords ***
 Get Inventory Schema
     [Documentation]  Get inventory schema.