diff --git a/defaults.lua b/defaults.lua
index 26ec2f5c0..99909d8d1 100644
--- a/defaults.lua
+++ b/defaults.lua
@@ -53,6 +53,9 @@ DSHOWFILESIZE = false
 -- default to true, set to false for counterclockwise rotation
 DLANDSCAPE_CLOCKWISE_ROTATION = true
 
+-- page overlap pixels
+DOVERLAPPIXELS = 30
+
 -- customizable tap zones(rectangles)
 -- x: x coordinate of top left corner in proportion of screen width
 -- y: y coordinate of top left corner in proportion of screen height
diff --git a/frontend/ui/reader/readerpaging.lua b/frontend/ui/reader/readerpaging.lua
index 56b5dbc1c..ccc661fbd 100644
--- a/frontend/ui/reader/readerpaging.lua
+++ b/frontend/ui/reader/readerpaging.lua
@@ -17,7 +17,7 @@ local ReaderPaging = InputContainer:new{
 	visible_area = nil,
 	page_area = nil,
 	show_overlap_enable = nil,
-	overlap = Screen:scaleByDPI(30),
+	overlap = Screen:scaleByDPI(DOVERLAPPIXELS),
 	
 	page_flipping_mode = false,
 	bookmark_flipping_mode = false,