diff --git a/device.mk b/device.mk
index 3a27ccb9..21826af8 100644
--- a/device.mk
+++ b/device.mk
@@ -632,7 +632,7 @@ PRODUCT_DEFAULT_PROPERTY_OVERRIDES += debug.sf.frame_rate_multiple_threshold=120
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += debug.sf.layer_caching_active_layer_timeout_ms=1000
 
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.enable_layer_caching=true
-PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_idle_timer_ms=80
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_idle_timer_ms?=80
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_touch_timer_ms=200
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_display_power_timer_ms=1000
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.use_content_detection_for_refresh_rate=true