diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index 27894fe39..bf8e40425 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -2774,6 +2774,9 @@ PMC_MAX_VETERANS = 20
 ; If set to false, we cannot fill sandbags or set up/remove fortifications while enemies are in the sector
 FORTIFICATION_ALLOW_IN_HOSTILE_SECTOR = TRUE
 
+; can roofs collapse when they or their supporting walls are hit?
+ROOF_COLLAPSE = TRUE
+
 ;******************************************************************************************************************************
 ;******************************************************************************************************************************