diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index 1511f6888..c3f655632 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -1849,6 +1849,21 @@ CAN_JUMP_THROUGH_CLOSED_WINDOWS = TRUE
 
 CAN_CLIMB_ON_WALLS = TRUE
 
+;------------------------------------------------------------------------------------------------------------------------------
+; MAX_BACKPACK_WEIGHT_TO_CLIMB is the maximum weight a backpack can weigh and still allow you to climb with. 
+; The sBackpackWeightModifier in items.xml can modify that number by either making it harder (positive number modifier) 
+; or easier (negative number modifier). If the sBackpackWeightToClimb is -1 (default) then the option is unused.
+; 
+; If USE_GLOBAL_BACKPACK_SETTINGS is TRUE (default), it uses the same rules for all backpacks, while if FALSE checks for 
+; the fAllowClimbing tag in Items.xml, and if that is true you can climb with the backpack.
+; 
+; Both options can be used at the same time, so you may climb with (for example) a malice backpack that weighs less than 5kg
+; (or 50 hg) but not climb with a radio set.
+;------------------------------------------------------------------------------------------------------------------------------
+
+MAX_BACKPACK_WEIGHT_TO_CLIMB = -1
+USE_GLOBAL_BACKPACK_SETTINGS = TRUE
+
 ;------------------------------------------------------------------------------------------------------------------------------
 ; Show enemy weapon name, armour and head items in tactical
 ;------------------------------------------------------------------------------------------------------------------------------
diff --git a/gamedir/Data/Ja2_Options.INI b/gamedir/Data/Ja2_Options.INI
index 2d3ec16d5..2e0fa341a 100644
--- a/gamedir/Data/Ja2_Options.INI
+++ b/gamedir/Data/Ja2_Options.INI
@@ -1825,6 +1825,21 @@ CAN_JUMP_THROUGH_CLOSED_WINDOWS = FALSE
 
 CAN_CLIMB_ON_WALLS = FALSE
 
+;------------------------------------------------------------------------------------------------------------------------------
+; MAX_BACKPACK_WEIGHT_TO_CLIMB is the maximum weight a backpack can weigh and still allow you to climb with. 
+; The sBackpackWeightModifier in items.xml can modify that number by either making it harder (positive number modifier) 
+; or easier (negative number modifier). If the sBackpackWeightToClimb is -1 (default) then the option is unused.
+; 
+; If USE_GLOBAL_BACKPACK_SETTINGS is TRUE (default), it uses the same rules for all backpacks, while if FALSE checks for 
+; the fAllowClimbing tag in Items.xml, and if that is true you can climb with the backpack.
+; 
+; Both options can be used at the same time, so you may climb with (for example) a malice backpack that weighs less than 5kg
+; (or 50 hg) but not climb with a radio set.
+;------------------------------------------------------------------------------------------------------------------------------
+
+MAX_BACKPACK_WEIGHT_TO_CLIMB = -1
+USE_GLOBAL_BACKPACK_SETTINGS = TRUE
+
 ;------------------------------------------------------------------------------------------------------------------------------
 ; Show enemy weapon name, armour and head items in tactical
 ;------------------------------------------------------------------------------------------------------------------------------