diff --git a/code/modules/mining/mine_turfs.dm b/code/modules/mining/mine_turfs.dm
index 852f0313b35..a491d383ffa 100644
--- a/code/modules/mining/mine_turfs.dm
+++ b/code/modules/mining/mine_turfs.dm
@@ -45,6 +45,7 @@ var/list/mining_overlay_cache = list()
 	icon_state = "asteroid"
 	density = 0
 	opacity = 0
+	blocks_air = 0
 
 /turf/simulated/mineral/floor/ignore_mapgen
 	ignore_mapgen = 1
@@ -54,6 +55,7 @@ var/list/mining_overlay_cache = list()
 		return
 	density = 0
 	opacity = 0
+	blocks_air = 0
 	update_general()
 
 /turf/simulated/mineral/proc/make_wall()
@@ -61,6 +63,7 @@ var/list/mining_overlay_cache = list()
 		return
 	density = 1
 	opacity = 1
+	blocks_air = 1
 	update_general()
 
 /turf/simulated/mineral/proc/update_general()