diff --git a/api_signaling.go b/api_signaling.go
index c43351b..d30ea6e 100644
--- a/api_signaling.go
+++ b/api_signaling.go
@@ -489,7 +489,7 @@ type AddSessionInternalClientMessage struct {
 	User   *json.RawMessage `json:"user,omitempty"`
 	Flags  uint32           `json:"flags,omitempty"`
 
-	Options *AddSessionOptions `json:"options,omitempy"`
+	Options *AddSessionOptions `json:"options,omitempty"`
 }
 
 func (m *AddSessionInternalClientMessage) CheckValid() error {