diff --git a/sys/dev/bhnd/tools/nvram_map_gen.sh b/sys/dev/bhnd/tools/nvram_map_gen.sh
index d2b981a1c7a..5b3409b58ce 100755
--- a/sys/dev/bhnd/tools/nvram_map_gen.sh
+++ b/sys/dev/bhnd/tools/nvram_map_gen.sh
@@ -9,4 +9,4 @@ BHND_TOOLDIR="$(dirname $0)/"
 
 LC_ALL=C; export LC_ALL
 
-"$BHND_TOOLDIR/nvram_map_gen.awk" $@
+"${AWK:-/usr/bin/awk}" -f "$BHND_TOOLDIR/nvram_map_gen.awk" $@