diff --git a/tools/builder_common.sh b/tools/builder_common.sh
index 64a5b525a5..ded729d635 100644
--- a/tools/builder_common.sh
+++ b/tools/builder_common.sh
@@ -48,6 +48,8 @@ if [ -z "${IMAGES_FINAL_DIR}" -o "${IMAGES_FINAL_DIR}" = "/" ]; then
 	print_error_pfS
 fi
 
+kldload filemon >/dev/null 2>&1
+
 lc() {
 	echo "${1}" | tr '[[:upper:]]' '[[:lower:]]'
 }