diff --git a/factory_common.mk b/factory_common.mk
index 8bb41278..8befad2c 100644
--- a/factory_common.mk
+++ b/factory_common.mk
@@ -48,7 +48,7 @@ PRODUCT_PROPERTY_OVERRIDES += \
 PRODUCT_PROPERTY_OVERRIDES += \
     debug.disable_screen_decorations=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