diff --git a/subsys/bluetooth/controller/ll_sw/ull_master.c b/subsys/bluetooth/controller/ll_sw/ull_master.c
index 937c04f16e2..3be93653195 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_master.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_master.c
@@ -744,6 +744,7 @@ void ull_master_ticker_cb(uint32_t ticks_at_expire, uint32_t remainder, uint16_t
 		/* Handle any LL Control Procedures */
 		ret = ull_conn_llcp(conn, ticks_at_expire, lazy);
 		if (ret) {
+			DEBUG_RADIO_PREPARE_M(0);
 			return;
 		}
 	}
diff --git a/subsys/bluetooth/controller/ll_sw/ull_slave.c b/subsys/bluetooth/controller/ll_sw/ull_slave.c
index 44de2f05bb0..4b99f62ba62 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_slave.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_slave.c
@@ -391,6 +391,7 @@ void ull_slave_ticker_cb(uint32_t ticks_at_expire, uint32_t remainder,
 		/* Handle any LL Control Procedures */
 		ret = ull_conn_llcp(conn, ticks_at_expire, lazy);
 		if (ret) {
+			DEBUG_RADIO_PREPARE_S(0);
 			return;
 		}
 	}