--- a/src/ast_dump.rs
+++ b/src/ast_dump.rs
@@ -226,7 +226,18 @@ impl stmt {
         let current_indent = make_indent(indent);
         match self.clone() {
             stmt::ClassDef(name, bases, keywords, body, decorator_list) => format!("{}class {}({}):\n{}", current_indent, name, vec_to_strings_vec(bases).join(", "), statements_to_string(indent, body)),
-            stmt::FunctionDef(name, arguments, body, decorator_list, returns) => format!("{}def {}({}):\n{}", current_indent, name, arguments.to_string(), statements_to_string(indent, body)),
+            stmt::FunctionDef(name, arguments, body, decorator_list, returns) => {
+                format!("{}def {}({}){}:\n{}",
+                    current_indent,
+                    name,
+                    arguments.to_string(),
+                    match returns {
+                        None => String::new(),
+                        Some(returns) => format!(" -> {}", returns.to_string())
+                    },
+                    statements_to_string(indent, body)
+                )
+            }
             stmt::Global(names) => format!("{}global {}", current_indent, names.join(", ")),
             stmt::Nonlocal(names) => format!("{}nonlocal {}", current_indent, names.join(", ")),
             stmt::If(test, body, orelse) => format!("{}if {}:\n{}", current_indent, test.to_string(), if_else_statements_to_string(indent, body, orelse)),