diff --git a/latex.lua b/latex.lua
index 4e1521f..b432ad4 100644
--- a/latex.lua
+++ b/latex.lua
@@ -47,6 +47,18 @@ function latex.describe_color(cstr)
 	end
 end
 
+--- Describe a coupler in LaTeX.
+-- @tparam string coupler The name of the coupler.
+-- @treturn string The string describing the coupler.
+function latex.describe_coupler(coupler)
+	local name = utils.get_coupler_name(coupler)
+	if name then
+		return ([[%s (\texttt{%s})]]):format(SL(name), SL(coupler))
+	else
+		return ([[\texttt{%s}]]):format(SL(coupler))
+	end
+end
+
 --- Describe a wagon prototype in LaTeX.
 -- @tparam string itemname The item name of the wagon prototype.
 -- @treturn string The description of the prototype.
@@ -151,7 +163,7 @@ function latex.describe_wagon_prototype(itemname)
 			ccouplers[k] = true
 		end
 		for k in pairs(ccouplers) do
-			local desc = SL(utils.get_coupler_name(k))
+			local desc = latex.describe_coupler(k)
 			table.insert(lcouplers, desc)
 			couplerid[desc] = k
 		end