diff --git a/tools/generate-symbols.sh b/tools/generate-symbols.sh
index 188949fb..34d4298b 100755
--- a/tools/generate-symbols.sh
+++ b/tools/generate-symbols.sh
@@ -6,4 +6,6 @@ source $(dirname $0)/env.sh
 
 cd $LUNA_ROOT
 
-nm -C -n initrd/boot/moon | grep -vE \\.Lubsan_data | awk '{ if ($2 != "a") print; }' | uniq > initrd/sys/moon.sym
\ No newline at end of file
+nm -C -n initrd/boot/moon | grep -vE \\.Lubsan_data | awk '{ if ($2 != "a") print; }' | uniq > initrd/sys/moon.sym
+
+chmod 400 initrd/sys/moon.sym
\ No newline at end of file