diff --git a/code/modules/research/rdmachines.dm b/code/modules/research/rdmachines.dm
index 2bcf7ef66e..cacdefae23 100644
--- a/code/modules/research/rdmachines.dm
+++ b/code/modules/research/rdmachines.dm
@@ -36,19 +36,20 @@
 
 /obj/machinery/r_n_d/proc/getMaterialName(var/type)
 	switch(type)
-		if(/obj/item/stack/material/steel)
+		//50-stacks weren't working despite being a subtype of the others, let's just force it in
+		if(/obj/item/stack/material/steel, /obj/item/stack/material/steel/fifty)
 			return DEFAULT_WALL_MATERIAL
-		if(/obj/item/stack/material/glass)
+		if(/obj/item/stack/material/glass, /obj/item/stack/material/glass/fifty)
 			return "glass"
-		if(/obj/item/stack/material/gold)
+		if(/obj/item/stack/material/gold, /obj/item/stack/material/gold/fifty)
 			return "gold"
-		if(/obj/item/stack/material/silver)
+		if(/obj/item/stack/material/silver, /obj/item/stack/material/silver/fifty)
 			return "silver"
-		if(/obj/item/stack/material/phoron)
+		if(/obj/item/stack/material/phoron, /obj/item/stack/material/phoron/fifty)
 			return "phoron"
-		if(/obj/item/stack/material/uranium)
+		if(/obj/item/stack/material/uranium, /obj/item/stack/material/uranium/fifty)
 			return "uranium"
-		if(/obj/item/stack/material/diamond)
+		if(/obj/item/stack/material/diamond, /obj/item/stack/material/diamond/fifty)
 			return "diamond"
 
 /obj/machinery/r_n_d/proc/eject(var/material, var/amount)