diff --git a/crereader.lua b/crereader.lua
index 6fe0eebec..69bfc1ec5 100644
--- a/crereader.lua
+++ b/crereader.lua
@@ -287,14 +287,17 @@ end
 function CREReader:prevBookMarkedPage()
 	local pre_item = nil
 	for k,v in ipairs(self.bookmarks) do
+		Debug(v)
 		if self.pos <= self.doc:getPosFromXPointer(v.page) then
-			if self.doc:getPosFromXPointer(pre_item.page) < self.pos then
+			if not pre_item then
+				break
+			elseif self.doc:getPosFromXPointer(pre_item.page) < self.pos then
 				return pre_item
 			end
 		end
 		pre_item = v
 	end
-	return nil
+	return pre_item
 end
 
 function CREReader:showBookMarks()
@@ -410,7 +413,7 @@ function CREReader:adjustCreReaderCommands()
 			else
 				bm = self:nextBookMarkedPage()
 			end
-			if bm then self:goto(bm.page, "xpointer") end
+			if bm then self:goto(bm.page, nil, "xpointer") end
 		end
 	)
 	self.commands:addGroup(MOD_ALT.."< >",{
diff --git a/unireader.lua b/unireader.lua
index f730ab3e4..06f106024 100644
--- a/unireader.lua
+++ b/unireader.lua
@@ -1750,13 +1750,15 @@ function UniReader:prevBookMarkedPage()
 	local pre_item = nil
 	for k,v in ipairs(self.bookmarks) do
 		if self.pageno <= v.page then
-			if pre_item.page < self.pageno then
+			if not pre_item then
+				break
+			elseif pre_item.page < self.pageno then
 				return pre_item
 			end
 		end
 		pre_item = v
 	end
-	return nil
+	return pre_item
 end
 
 function UniReader:showHighLight()
@@ -1925,11 +1927,15 @@ function UniReader:addAllCommands()
 	self.commands:addGroup(MOD_SHIFT.."< >",{
 		Keydef:new(KEY_PGBCK,MOD_SHIFT),Keydef:new(KEY_PGFWD,MOD_SHIFT),
 		Keydef:new(KEY_LPGBCK,MOD_SHIFT),Keydef:new(KEY_LPGFWD,MOD_SHIFT)},
-		"zoom out/in 20%",
+		"jump between bookmarks",
 		function(unireader,keydef)
-			is_zoom_out = (keydef.keycode == KEY_PGBCK or keydef.keycode == KEY_LPGBCK)
-			unireader:setGlobalZoom(unireader.globalzoom_orig
-				+ ( is_zoom_out and -1 or 1)*unireader.globalzoom_orig*0.2)
+			is_prev_bm = (keydef.keycode == KEY_PGBCK or keydef.keycode == KEY_LPGBCK)
+			if is_prev_bm then
+				bm = self:prevBookMarkedPage()
+			else
+				bm = self:nextBookMarkedPage()
+			end
+			if bm then self:goto(bm.page) end
 		end)
 	self.commands:add(KEY_BACK,nil,"Back",
 		"go backward in jump history",