diff --git a/include/cdma-voicecall.h b/include/cdma-voicecall.h
index b170e393..f12e0b69 100644
--- a/include/cdma-voicecall.h
+++ b/include/cdma-voicecall.h
@@ -61,6 +61,9 @@ struct ofono_cdma_voicecall_driver {
 
 	void (*send_flash)(struct ofono_cdma_voicecall *vc, const char *string,
 			ofono_cdma_voicecall_cb_t cb, void *data);
+
+	void (*send_tones)(struct ofono_cdma_voicecall *vc, const char *tones,
+			ofono_cdma_voicecall_cb_t cb, void *data);
 };
 
 void ofono_cdma_voicecall_disconnected(struct ofono_cdma_voicecall *vc,