diff --git a/services/graphql/src/definitions/customer.js b/services/graphql/src/definitions/customer.js
index aa2e1bd..c170202 100644
--- a/services/graphql/src/definitions/customer.js
+++ b/services/graphql/src/definitions/customer.js
@@ -295,6 +295,8 @@ input RapidCustomerIdentificationBehaviorInput {
   id: Int!
   "The date the behavior occurred."
   date: DateTime
+  "An optional promo code to associate with this specific behavior. Falls back to the top-level promoCode if not set."
+  behaviorPromoCode: String
   "An array of pre-defined key-values to send with the behavior."
   attributes: [RapidCustomerIdentificationBehaviorAttributeInput!]! = []
 }
diff --git a/services/graphql/src/resolvers/customer.js b/services/graphql/src/resolvers/customer.js
index bb460cd..23eb951 100644
--- a/services/graphql/src/resolvers/customer.js
+++ b/services/graphql/src/resolvers/customer.js
@@ -469,9 +469,17 @@ module.exports = {
           })),
         }),
         ...(behaviors.length && {
-          CustomerBehaviors: behaviors.map(({ id, date, attributes }) => ({
+          CustomerBehaviors: behaviors.map(({
+            id,
+            date,
+            behaviorPromoCode,
+            attributes,
+          }) => ({
             BehaviorId: id,
             BehaviorDate: dayjs(date || new Date()).format('YYYY-MM-DD HH:mm:ss'),
+            ...((behaviorPromoCode || promoCode) && {
+              BehaviorPromoCode: behaviorPromoCode || promoCode,
+            }),
             ...(attributes.length && {
               BehaviorAttributes: attributes.map((attr) => {
                 if (!attr.valueId && !attr.value) throw new UserInputError('One of `valueId` or `value` must be specified for behavior attribute!');