diff --git a/spec/printer/teal_type_definition_spec.tl b/spec/printer/teal_type_definition_spec.tl
index 2714ac2..5a78bf4 100644
--- a/spec/printer/teal_type_definition_spec.tl
+++ b/spec/printer/teal_type_definition_spec.tl
@@ -108,7 +108,7 @@ describe("Teal type definition Printer", function()
                      token = "variable",
                   },
                },
-               return_types = { "boolean" },
+               return_types = { { "boolean" } },
                name = "kill",
                token = "function",
             },