diff --git a/github/pulls.go b/github/pulls.go
index 71cf2e2..8f31ab5 100644
--- a/github/pulls.go
+++ b/github/pulls.go
@@ -43,6 +43,7 @@ type PullRequest struct {
 	StatusesURL  *string    `json:"statuses_url,omitempty"`
 	DiffURL      *string    `json:"diff_url,omitempty"`
 	PatchURL     *string    `json:"patch_url,omitempty"`
+	Assignee     *User      `json:"assignee,omitempty"` // probably only in webhooks
 
 	Head *PullRequestBranch `json:"head,omitempty"`
 	Base *PullRequestBranch `json:"base,omitempty"`