diff --git a/sys/contrib/dev/iwlwifi/fw/api/sta.h b/sys/contrib/dev/iwlwifi/fw/api/sta.h
--- a/sys/contrib/dev/iwlwifi/fw/api/sta.h
+++ b/sys/contrib/dev/iwlwifi/fw/api/sta.h
@@ -477,7 +477,11 @@
 	u8 decryption_type;
 	u8 flags;
 	u8 reserved;
+#if defined(__linux__)
 	struct iwl_mvm_wep_key wep_key[];
+#elif defined(__FreeBSD__)
+	struct iwl_mvm_wep_key wep_key[0];
+#endif
 } __packed; /* SEC_CURR_WEP_KEY_CMD_API_S_VER_2 */
 
 /**
diff --git a/sys/contrib/dev/iwlwifi/mvm/d3.c b/sys/contrib/dev/iwlwifi/mvm/d3.c
--- a/sys/contrib/dev/iwlwifi/mvm/d3.c
+++ b/sys/contrib/dev/iwlwifi/mvm/d3.c
@@ -7,6 +7,9 @@
 #include <linux/etherdevice.h>
 #include <linux/ip.h>
 #include <linux/fs.h>
+#if defined(__FreeBSD__)
+#include <linux/string.h>
+#endif
 #include <net/cfg80211.h>
 #include <net/ipv6.h>
 #include <net/tcp.h>
diff --git a/sys/modules/iwlwifi/Makefile b/sys/modules/iwlwifi/Makefile
--- a/sys/modules/iwlwifi/Makefile
+++ b/sys/modules/iwlwifi/Makefile
@@ -3,6 +3,7 @@
 
 .PATH: ${DEVIWLWIFIDIR}
 
+WITH_CONFIG_PM=	0
 WITH_DEBUGFS=	0
 
 KMOD=	if_iwlwifi
@@ -36,6 +37,11 @@
 CFLAGS+=	-DCONFIG_IWLWIFI_DEBUGFS=${WITH_DEBUGFS}
 CFLAGS+=	-DCONFIG_MAC80211_DEBUGFS=${WITH_DEBUGFS}
 .endif
+.if defined(WITH_CONFIG_PM) && ${WITH_CONFIG_PM} > 0
+SRCS+=	mvm/d3.c
+CFLAGS+=	-DCONFIG_PM=${WITH_CONFIG_PM}
+CFLAGS+=	-DCONFIG_PM_SLEEP=${WITH_CONFIG_PM}
+.endif
 
 SRCS+=	iwl-devtrace.c
 
@@ -61,8 +67,6 @@
 CFLAGS+=	-DCONFIG_IWLWIFI_DEVICE_TRACING=1
 #CFLAGS+=	-DCONFIG_LOCKDEP=1
 #CFLAGS+=	-DCONFIG_NL80211_TESTMODE=1
-#CFLAGS+=	-DCONFIG_PM=1
-#CFLAGS+=	-DCONFIG_PM_SLEEP=1
 #CFLAGS+=	-DCONFIG_THERMAL=1
 #CFLAGS+=	-DCONFIG_EFI=1