Index: head/sys/dev/iwm/if_iwm.c
===================================================================
--- head/sys/dev/iwm/if_iwm.c
+++ head/sys/dev/iwm/if_iwm.c
@@ -442,6 +442,8 @@
 	return 0;
 }
 
+#define IWM_DEFAULT_SCAN_CHANNELS 40
+
 /* iwlwifi: iwl-drv.c */
 struct iwm_tlv_calib_data {
 	uint32_t ucode_type;
@@ -518,7 +520,7 @@
 
 	/* (Re-)Initialize default values. */
 	sc->sc_capaflags = 0;
-	sc->sc_capa_n_scan_channels = IWM_MAX_NUM_SCAN_CHANNELS;
+	sc->sc_capa_n_scan_channels = IWM_DEFAULT_SCAN_CHANNELS;
 	memset(sc->sc_enabled_capa, 0, sizeof(sc->sc_enabled_capa));
 	memset(sc->sc_fw_mcc, 0, sizeof(sc->sc_fw_mcc));
 
Index: head/sys/dev/iwm/if_iwmreg.h
===================================================================
--- head/sys/dev/iwm/if_iwmreg.h
+++ head/sys/dev/iwm/if_iwmreg.h
@@ -4799,9 +4799,6 @@
 #define IWM_FAST_SCHED_SCAN_ITERATIONS 3
 #define IWM_MAX_SCHED_SCAN_PLANS 2
 
-/* Maximal number of channels to scan */
-#define IWM_MAX_NUM_SCAN_CHANNELS 0x24
-
 /**
  * iwm_scan_schedule_lmac - schedule of scan offload
  * @delay:		delay between iterations, in seconds.