diff --git a/github/authorizations.go b/github/authorizations.go
index 35ce9a9..d5a5e63 100644
--- a/github/authorizations.go
+++ b/github/authorizations.go
@@ -346,9 +346,6 @@ func (s *AuthorizationsService) ListGrants() ([]*Grant, *Response, error) {
 		return nil, nil, err
 	}
 
-	// TODO: remove custom Accept header when this API fully launches.
-	req.Header.Set("Accept", mediaTypeOAuthGrantAuthorizationsPreview)
-
 	grants := []*Grant{}
 	resp, err := s.client.Do(req, &grants)
 	if err != nil {
@@ -368,9 +365,6 @@ func (s *AuthorizationsService) GetGrant(id int) (*Grant, *Response, error) {
 		return nil, nil, err
 	}
 
-	// TODO: remove custom Accept header when this API fully launches.
-	req.Header.Set("Accept", mediaTypeOAuthGrantAuthorizationsPreview)
-
 	grant := new(Grant)
 	resp, err := s.client.Do(req, grant)
 	if err != nil {
@@ -392,9 +386,6 @@ func (s *AuthorizationsService) DeleteGrant(id int) (*Response, error) {
 		return nil, err
 	}
 
-	// TODO: remove custom Accept header when this API fully launches.
-	req.Header.Set("Accept", mediaTypeOAuthGrantAuthorizationsPreview)
-
 	return s.client.Do(req, nil)
 }
 
diff --git a/github/authorizations_test.go b/github/authorizations_test.go
index 90a5324..621cf78 100644
--- a/github/authorizations_test.go
+++ b/github/authorizations_test.go
@@ -256,7 +256,6 @@ func TestListGrants(t *testing.T) {
 
 	mux.HandleFunc("/applications/grants", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "GET")
-		testHeader(t, r, "Accept", mediaTypeOAuthGrantAuthorizationsPreview)
 		fmt.Fprint(w, `[{"id": 1}]`)
 	})
 
@@ -277,7 +276,6 @@ func TestGetGrant(t *testing.T) {
 
 	mux.HandleFunc("/applications/grants/1", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "GET")
-		testHeader(t, r, "Accept", mediaTypeOAuthGrantAuthorizationsPreview)
 		fmt.Fprint(w, `{"id": 1}`)
 	})
 
@@ -298,7 +296,6 @@ func TestDeleteGrant(t *testing.T) {
 
 	mux.HandleFunc("/applications/grants/1", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "DELETE")
-		testHeader(t, r, "Accept", mediaTypeOAuthGrantAuthorizationsPreview)
 	})
 
 	_, err := client.Authorizations.DeleteGrant(1)
diff --git a/github/github.go b/github/github.go
index 465574b..c52642d 100644
--- a/github/github.go
+++ b/github/github.go
@@ -79,9 +79,6 @@ const (
 	// https://developer.github.com/changes/2016-06-14-repository-invitations/
 	mediaTypeRepositoryInvitationsPreview = "application/vnd.github.swamp-thing-preview+json"
 
-	// https://developer.github.com/changes/2016-04-21-oauth-authorizations-grants-api-preview/
-	mediaTypeOAuthGrantAuthorizationsPreview = "application/vnd.github.damage-preview+json"
-
 	// https://developer.github.com/changes/2016-07-06-github-pages-preiew-api/
 	mediaTypePagesPreview = "application/vnd.github.mister-fantastic-preview+json"