diff --git a/v5/filters.go b/v5/filters.go
index 50f36b9..deedf0a 100644
--- a/v5/filters.go
+++ b/v5/filters.go
@@ -53,6 +53,7 @@ type CustomersFilter struct {
 	CampaignName               string            `url:"campaignName,omitempty"`
 	KeywordName                string            `url:"keywordName,omitempty"`
 	AdContentName              string            `url:"adContentName,omitempty"`
+	MgCustomerID               string            `url:"mgCustomerId,omitempty"`
 	CustomFields               map[string]string `url:"customFields,omitempty,brackets"`
 }
 
diff --git a/v5/types.go b/v5/types.go
index 0fd9c4a..81f28f0 100644
--- a/v5/types.go
+++ b/v5/types.go
@@ -140,6 +140,7 @@ type Customer struct {
 	FirstClientID                string              `json:"firstClientId,omitempty"`
 	LastClientID                 string              `json:"lastClientId,omitempty"`
 	BrowserID                    string              `json:"browserId,omitempty"`
+	MgCustomerID                 string              `json:"mgCustomerId,omitempty"`
 	CustomFields                 []map[string]string `json:"customFields,omitempty,brackets"`
 }