diff --git a/rootdir/etc/fstab.mt6768 b/rootdir/etc/fstab.mt6768
index 66edaf8..275d998 100644
--- a/rootdir/etc/fstab.mt6768
+++ b/rootdir/etc/fstab.mt6768
@@ -112,4 +112,4 @@ odm /odm ext4 ro wait,,avb,logical,first_stage_mount
 
 /dev/block/platform/bootdevice/by-name/uh /uh emmc defaults defaults
 
-/dev/block/zram0 none swap defaults zramsize=55%,max_comp_streams=8
+/dev/block/zram0 none swap defaults zramsize=55%,max_comp_streams=8,zram_backingdev_size=512M
diff --git a/rootdir/etc/fstab.mt6769t b/rootdir/etc/fstab.mt6769t
index 66edaf8..275d998 100644
--- a/rootdir/etc/fstab.mt6769t
+++ b/rootdir/etc/fstab.mt6769t
@@ -112,4 +112,4 @@ odm /odm ext4 ro wait,,avb,logical,first_stage_mount
 
 /dev/block/platform/bootdevice/by-name/uh /uh emmc defaults defaults
 
-/dev/block/zram0 none swap defaults zramsize=55%,max_comp_streams=8
+/dev/block/zram0 none swap defaults zramsize=55%,max_comp_streams=8,zram_backingdev_size=512M