diff --git a/sys/modules/bwn/Makefile b/sys/modules/bwn/Makefile
index 37c7b35d..962aa268 100644
--- a/sys/modules/bwn/Makefile
+++ b/sys/modules/bwn/Makefile
@@ -24,15 +24,33 @@ SRCS+=	bhndb_bus_if.h \
 # Other
 SRCS+=	device_if.h bus_if.h gpio_if.h pci_if.h opt_bwn.h opt_wlan.h
 
-# The following need the BWN_GPL_PHY kenrel option to opt-in
-# to the GPL'd 802.11n PHY support for this driver.
+# BWN_GPL_PHY: enable GPLv2 802.11n PHY support (required for N-PHY chips like BCM43224).
+# Without this, bwn(4) attaches but bwn_phy_n_attach() fails with:
+#   "BWN_GPL_PHY not in kernel config; no PHY-N support".
+# NOTE: We define it here (not via the kernel config) because this is a
+# standalone module build; bsd.kmod.mk only honours SRCS.<OPT> when <OPT> is
+# present in KERN_OPTS, which it is not for out-of-tree module builds.
+opt_bwn.h:
+	@echo "#define BWN_GPL_PHY 1" > ${.TARGET}
+
+# The following are the GPL'd 802.11n PHY support files for this driver.
+# They MUST be added unconditionally to SRCS (not via SRCS.BWN_GPL_PHY),
+# because a standalone module build does not populate KERN_OPTS with
+# BWN_GPL_PHY, so the SRCS.<OPT> mechanism would skip them entirely.
 .PATH: ${SRCTOP}/sys/gnu/dev/bwn/phy_n
-SRCS.BWN_GPL_PHY+=  if_bwn_radio_2055.c
-SRCS.BWN_GPL_PHY+=  if_bwn_radio_2056.c
-SRCS.BWN_GPL_PHY+=  if_bwn_radio_2057.c
-SRCS.BWN_GPL_PHY+=  if_bwn_phy_n_sprom.c
-SRCS.BWN_GPL_PHY+=  if_bwn_phy_n_tables.c
-SRCS.BWN_GPL_PHY+=  if_bwn_phy_n_ppr.c
-SRCS.BWN_GPL_PHY+=  if_bwn_phy_n_core.c
+SRCS+=  if_bwn_radio_2055.c
+SRCS+=  if_bwn_radio_2056.c
+SRCS+=  if_bwn_radio_2057.c
+SRCS+=  if_bwn_phy_n_sprom.c
+SRCS+=  if_bwn_phy_n_tables.c
+SRCS+=  if_bwn_phy_n_ppr.c
+SRCS+=  if_bwn_phy_n_core.c
 
 .include <bsd.kmod.mk>
+
+# Temporary debug build
+CFLAGS+= -DBWN_DEBUG
+CFLAGS+= -DBWN_DEBUG
+
+# Temporary debug build
+CFLAGS+= -DBWN_DEBUG