diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index e457edd16..263ede00b 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -130,6 +130,14 @@ OLD_INVENTORY_ITEM_NUMBER = 99
 ;------------------------------------------------------------------------------------------------------------------------------
 USE_NEW_CTH_CALCULATION = TRUE
 
+;------------------------------------------------------------------------------------------------------------------------------
+; ALLOW_TARGET_HEADANDLEG_IFPRONE is an experimental switch which allows targetting/hitting head/torso/legs for
+; prone targets (until now, hits were always considered on torso).
+; Additionally soldiers are no longer protected from stray bullets in crouched and prone stance.
+; This switch will be removed once this code change has been accepted (or deemed unacceptable).
+;------------------------------------------------------------------------------------------------------------------------------
+ALLOW_TARGET_HEADANDLEG_IFPRONE = TRUE
+
 ;******************************************************************************************************************************
 ;******************************************************************************************************************************