diff --git a/clientapi/threepid/threepid.go b/clientapi/threepid/threepid.go
index d61052cc..5a57ef9c 100644
--- a/clientapi/threepid/threepid.go
+++ b/clientapi/threepid/threepid.go
@@ -83,6 +83,7 @@ func CreateSession(
 	if err != nil {
 		return "", err
 	}
+	defer resp.Body.Close()
 
 	// Error if the status isn't OK
 	if resp.StatusCode != http.StatusOK {