diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 8461714..50e3106 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -661,4 +661,7 @@
         <item>1</item> <!-- COLOR_MODE_BOOSTED -->
         <item>2</item> <!-- COLOR_MODE_SATURATED -->
     </integer-array>
+
+    <!-- Enable Zram writeback feature to allow unused pages in zram be written to flash. -->
+    <bool name="config_zramWriteback">true</bool>
 </resources>
diff --git a/vendor.prop b/vendor.prop
index 907648a..e6a7062 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -233,3 +233,8 @@ persist.vendor.ssr.restart_level=ALL_ENABLE
 # WFD
 persist.debug.wfd.enable=1
 persist.sys.wfd.virtual=0
+
+# ZRAM writeback
+ro.zram.mark_idle_delay_mins=60
+ro.zram.first_wb_delay_mins=180
+ro.zram.periodic_wb_delay_hours=24