diff --git a/build_library/grub_install.sh b/build_library/grub_install.sh
index 9190f6ec10..d6f186f48b 100755
--- a/build_library/grub_install.sh
+++ b/build_library/grub_install.sh
@@ -43,7 +43,7 @@ GRUB_DIR="flatcar/grub/${FLAGS_target}"
 GRUB_SRC="/usr/lib/grub/${FLAGS_target}"
 
 # Modules required to boot a standard CoreOS configuration
-CORE_MODULES=( normal search test fat part_gpt search_fs_uuid gzio search_part_label terminal gptprio configfile memdisk tar echo read )
+CORE_MODULES=( normal search test fat part_gpt search_fs_uuid gzio search_part_label terminal gptprio configfile memdisk tar echo read btrfs )
 
 # Name of the core image, depends on target
 CORE_NAME=