diff --git a/sys/modules/rtw88/Makefile b/sys/modules/rtw88/Makefile
--- a/sys/modules/rtw88/Makefile
+++ b/sys/modules/rtw88/Makefile
@@ -40,4 +40,7 @@
 CFLAGS+=	-DCONFIG_RTW88_DEBUG
 #CFLAGS+=	-DCONFIG_RTW88_DEBUGFS
 
+# GCC warns about set but unused vaf variables
+CWARNFLAGS.debug.c+= ${NO_WUNUSED_BUT_SET_VARIABLE}
+
 .include <bsd.kmod.mk>