diff --git a/usr.sbin/wpa/Makefile.inc b/usr.sbin/wpa/Makefile.inc
index a43792d97403..915b5312f02f 100644
--- a/usr.sbin/wpa/Makefile.inc
+++ b/usr.sbin/wpa/Makefile.inc
@@ -71,6 +71,7 @@ CFLAGS+=-DEAP_TLS_FUNCS
 CFLAGS+=-DCONFIG_WNM
 CFLAGS+=-DCONFIG_WNM_AP
 CFLAGS+=-DCONFIG_MBO
+CFLAGS+=-DCONFIG_RSN_PREAUTH
 
 .if ${MK_WPA_SUPPLICANT_EAPOL} != "no"
 CFLAGS+=-DCONFIG_HS20 \