diff --git a/code/modules/research/rdconsole.dm b/code/modules/research/rdconsole.dm
index b07a7d4dc5b..6c872ca91ac 100644
--- a/code/modules/research/rdconsole.dm
+++ b/code/modules/research/rdconsole.dm
@@ -716,9 +716,9 @@ won't update every console in existence) but it's more of a hassle to do. Also,
 					dat += "<li><h3>[last_category]</h3>"
 				var/temp_dat
 				for(var/M in D.materials)
-					temp_dat += ", [D.materials[M]*linked_imprinter.mat_efficiency] [CallMaterialName(M)]"
+					temp_dat += ", [D.materials[M]*linked_lathe.mat_efficiency] [CallMaterialName(M)]"
 				for(var/T in D.chemicals)
-					temp_dat += ", [D.chemicals[T]*linked_imprinter.mat_efficiency] [CallReagentName(T)]"
+					temp_dat += ", [D.chemicals[T]*linked_lathe.mat_efficiency] [CallReagentName(T)]"
 				if(temp_dat)
 					temp_dat = " \[[copytext(temp_dat, 3)]\]"
 				if(linked_lathe.canBuild(D))
diff --git a/html/changelogs/hellfirejag-protolathe-fixes.yml b/html/changelogs/hellfirejag-protolathe-fixes.yml
new file mode 100644
index 00000000000..8b0fe0bdb6b
--- /dev/null
+++ b/html/changelogs/hellfirejag-protolathe-fixes.yml
@@ -0,0 +1,4 @@
+author: Hellfirejag
+delete-after: True
+changes:
+  - bugfix: "Fixed a runtime error caused by robotics consoles using a protolathe when no circuit imprinter is connected."