diff --git a/code/modules/research/machinery/protolathe.dm b/code/modules/research/machinery/protolathe.dm
index 2f8c31951c1..5a6cb1fae9b 100644
--- a/code/modules/research/machinery/protolathe.dm
+++ b/code/modules/research/machinery/protolathe.dm
@@ -8,7 +8,7 @@
 								RND_CATEGORY_MEDICAL_DESIGNS,
 								RND_CATEGORY_BLUESPACE_DESIGNS,
 								RND_CATEGORY_STOCK_PARTS,
-								RND_CATEGORY_STOCK_PARTS,
+								RND_CATEGORY_EQUIPMENT,
 								RND_CATEGORY_TOOL_DESIGNS,
 								RND_CATEGORY_MINING_DESIGNS,
 								RND_CATEGORY_ELECTRONICS,