diff --git a/code/modules/mining/aux_base.dm b/code/modules/mining/aux_base.dm
index 925ea5b1f97..76c03c397a4 100644
--- a/code/modules/mining/aux_base.dm
+++ b/code/modules/mining/aux_base.dm
@@ -5,6 +5,7 @@
 #define BAD_AREA 2
 #define BAD_COORDS 3
 #define BAD_TURF 4
+#define BAD_LAYER 5
 
 /area/shuttle/auxiliary_base
 	name = "Auxiliary Base"
@@ -224,7 +225,9 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/auxiliary_base, 32)
 			var/turf/place = colony_turfs[i]
 			if(!place)
 				return BAD_COORDS
-			if(!istype(place.loc, /area/lavaland/surface))
+			if(istype(place.loc, /area/icemoon/surface))
+				return BAD_LAYER
+			if(!istype(place.loc, /area/lavaland/surface) && !istype(place.loc, /area/icemoon/underground))
 				return BAD_AREA
 			if(disallowed_turf_types[place.type])
 				return BAD_TURF
@@ -295,6 +298,8 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/auxiliary_base, 32)
 			to_chat(user, span_warning("Location is too close to the edge of the station's scanning range. Move several paces away and try again."))
 		if(BAD_TURF)
 			to_chat(user, span_warning("The landing zone contains turfs unsuitable for a base. Make sure you've removed all walls and dangerous terrain from the landing zone."))
+		if(BAD_LAYER)
+			to_chat(user, span_warning("This area is not hazardous enough to justify an auxiliary base. Try again on a deeper layer."))
 
 /obj/item/assault_pod/mining/unrestricted
 	name = "omni-locational landing field designator"
@@ -443,3 +448,4 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/auxiliary_base, 32)
 #undef BAD_AREA
 #undef BAD_COORDS
 #undef BAD_TURF
+#undef BAD_LAYER