diff --git a/plugin/fmt/init.lua b/plugin/fmt/init.lua
index 0fd30fd6..7e2db533 100644
--- a/plugin/fmt/init.lua
+++ b/plugin/fmt/init.lua
@@ -42,7 +42,7 @@ end
 ]]
 local function defaultTableDebugExtended(buffer, input)
 	-- Special case for empty tables.
-	if next(buffer) == nil then
+	if next(input) == nil then
 		buffer:writeRaw("{}")
 		return
 	end