diff --git a/modules/salesforce_mapping/config/schema/salesforce_mapping.schema.yml b/modules/salesforce_mapping/config/schema/salesforce_mapping.schema.yml
index 87461231ddb2e293a8097a293eb89652dd6ba2d5..e57bff2d1e10006249c56940764c2a7b958dc9e7 100644
--- a/modules/salesforce_mapping/config/schema/salesforce_mapping.schema.yml
+++ b/modules/salesforce_mapping/config/schema/salesforce_mapping.schema.yml
@@ -105,6 +105,9 @@ salesforce_mapping.salesforce_mapping.*:
             drupal_constant:
               type: string
               label: 'Drupal Constant'
+            description:
+              type: text
+              label: 'Description'
 
 # Schema / Config API requires that we add these:
     status: