diff --git a/init.lua b/init.lua
index 604a8b6..7630c6d 100644
--- a/init.lua
+++ b/init.lua
@@ -166,6 +166,7 @@ minetest.register_tool("doc_identifier:identifier_solid", {
 	_doc_items_hidden = false,
 	tool_capabilities = {},
 	range = 10,
+	groups = { disable_repair = 1 },
 	wield_image = "doc_identifier_identifier.png",
 	inventory_image = "doc_identifier_identifier.png",
 	liquids_pointable = false,