diff --git a/gdtoolkit/formatter/function_statement_to_str.py b/gdtoolkit/formatter/function_statement_to_str.py
index b9cec7d..3df5ddc 100644
--- a/gdtoolkit/formatter/function_statement_to_str.py
+++ b/gdtoolkit/formatter/function_statement_to_str.py
@@ -12,7 +12,7 @@ def function_statement_to_str(statement: Tree) -> str:
         "func_var_stmt": lambda s: function_statement_to_str(s.children[0]),
         "const_stmt": lambda s: function_statement_to_str(s.children[0]),
         "expr_stmt": lambda s: expression_to_str(s.children[0]),  # TODO: standalone?
-        "return_stmt": lambda s: f"return {standalone_expression_to_str(s.children[0])}",
+        "return_stmt": lambda s: "return" if len(s.children) == 0 else f"return {standalone_expression_to_str(s.children[0])}",
         "break_stmt": _not_implemented,
         "breakpoint_stmt": lambda _: "breakpoint",
         "continue_stmt": _not_implemented,