diff --git a/api/queries_pr.go b/api/queries_pr.go
index c1afc6bc9..c0b16f3c4 100644
--- a/api/queries_pr.go
+++ b/api/queries_pr.go
@@ -667,6 +667,7 @@ func CreatePullRequest(client *Client, repo *Repository, params map[string]inter
 			requestReviews(input: $input) { clientMutationId }
 		}`
 		reviewParams["pullRequestId"] = pr.ID
+		reviewParams["union"] = true
 		variables := map[string]interface{}{
 			"input": reviewParams,
 		}
diff --git a/command/pr_create_test.go b/command/pr_create_test.go
index 85966aa72..d6b89a6b0 100644
--- a/command/pr_create_test.go
+++ b/command/pr_create_test.go
@@ -184,6 +184,7 @@ func TestPRCreate_metadata(t *testing.T) {
 			eq(t, inputs["pullRequestId"], "NEWPULLID")
 			eq(t, inputs["userIds"], []interface{}{"HUBOTID"})
 			eq(t, inputs["teamIds"], []interface{}{"COREID"})
+			eq(t, inputs["union"], true)
 		}))
 
 	cs, cmdTeardown := test.InitCmdStubber()