diff --git a/src/simauth.h b/src/simauth.h
index be9abcf9..4b701a89 100644
--- a/src/simauth.h
+++ b/src/simauth.h
@@ -136,6 +136,8 @@ bool sim_auth_check_milenage(struct iwd_sim_auth *auth,
 bool sim_auth_run_gsm(struct iwd_sim_auth *auth, const uint8_t *rands,
 		int num_rands, sim_auth_run_gsm_cb_t cb, void *data);
 
+void sim_auth_cancel_request(struct iwd_sim_auth *auth, int id);
+
 bool sim_auth_init(void);
 
 void sim_auth_exit(void);