diff --git a/defaults.lua b/defaults.lua
index f4563b987..8f5e93219 100644
--- a/defaults.lua
+++ b/defaults.lua
@@ -116,6 +116,10 @@ DAUTO_SAVE_PAGING_COUNT = nil
 -- dictionary font size
 DDICT_FONT_SIZE = 20
 
+-- Frontlight decrease of sensitivity for two-fingered pan gesture,
+-- e.g. 2 changes the sensitivity by 1/2, 3 by 1/3 etc.
+FRONTLIGHT_SENSITIVITY_DECREASE = 2
+
 -- ####################################################################
 -- following features are not supported right now
 -- ####################################################################