diff --git a/github/orgs_members.go b/github/orgs_members.go
index 38f43bad5a..79f8a65333 100644
--- a/github/orgs_members.go
+++ b/github/orgs_members.go
@@ -315,8 +315,8 @@ type CreateOrgInvitationOptions struct {
 	// * billing_manager - Non-owner organization members with ability to
 	//   manage the billing settings of your organization.
 	// Default is "direct_member".
-	Role   *string `json:"role"`
-	TeamID []int64 `json:"team_ids"`
+	Role   *string `json:"role,omitempty"`
+	TeamID []int64 `json:"team_ids,omitempty"`
 }
 
 // CreateOrgInvitation invites people to an organization by using their GitHub user ID or their email address.