diff --git a/code/game/mecha/mech_fabricator.dm b/code/game/mecha/mech_fabricator.dm
index fe8ec5876d9..4a3a105e9af 100644
--- a/code/game/mecha/mech_fabricator.dm
+++ b/code/game/mecha/mech_fabricator.dm
@@ -83,6 +83,14 @@
 
 /obj/machinery/mecha_part_fabricator/Initialize()
 	. = ..()
+
+// Go through all materials, and add them to the possible storage, but hide them unless we contain them.
+	for(var/Name in name_to_material)
+		if(Name in materials)
+			continue
+
+		materials[Name] = 0
+
 	default_apply_parts()
 	files = new /datum/research(src) //Setup the research data holder.
 
diff --git a/code/modules/research/circuitprinter.dm b/code/modules/research/circuitprinter.dm
index d0aaebb7d89..d419829babb 100644
--- a/code/modules/research/circuitprinter.dm
+++ b/code/modules/research/circuitprinter.dm
@@ -26,6 +26,16 @@ using metal and glass, it uses glass and reagents (usually sulphuric acid).
 
 /obj/machinery/r_n_d/circuit_imprinter/Initialize()
 	. = ..()
+
+	spawn()	// Go through all materials, and add them to the possible storage, but hide them unless we contain them.
+		for(var/Name in name_to_material)
+			if(Name in materials)
+				continue
+
+			hidden_materials |= Name
+
+			materials[Name] = 0
+
 	default_apply_parts()
 
 /obj/machinery/r_n_d/circuit_imprinter/process()
diff --git a/code/modules/research/protolathe.dm b/code/modules/research/protolathe.dm
index 031fe074b1b..97a8274391e 100644
--- a/code/modules/research/protolathe.dm
+++ b/code/modules/research/protolathe.dm
@@ -40,6 +40,16 @@
 
 /obj/machinery/r_n_d/protolathe/Initialize()
 	. = ..()
+
+// Go through all materials, and add them to the possible storage, but hide them unless we contain them.
+	for(var/Name in name_to_material)
+		if(Name in materials)
+			continue
+
+		hidden_materials |= Name
+
+		materials[Name] = 0
+
 	default_apply_parts()
 
 /obj/machinery/r_n_d/protolathe/process()