diff --git a/sys/modules/iwlwifi/Makefile b/sys/modules/iwlwifi/Makefile
--- a/sys/modules/iwlwifi/Makefile
+++ b/sys/modules/iwlwifi/Makefile
@@ -66,4 +66,7 @@
 # GCC warns about NULL format strings passed to iwl_fw_dbg_collect_trig
 CWARNFLAGS.gcc+= -Wno-format
 
+# GCC warns about set but unused vaf variables
+CWARNFLAGS.iwl-debug.c+= ${NO_WUNUSED_BUT_SET_VARIABLE}
+
 .include <bsd.kmod.mk>