diff --git a/src/kuroko.c b/src/kuroko.c
index 3fe9788..4cbdb77 100644
--- a/src/kuroko.c
+++ b/src/kuroko.c
@@ -566,6 +566,7 @@ static int runString(char * argv[], int flags, char * string) {
 	findInterpreter(argv);
 	krk_initVM(flags);
 	krk_startModule("__main__");
+	krk_attachNamedValue(&krk_currentThread.module->fields,"__doc__", NONE_VAL());
 	krk_interpret(string, "<stdin>");
 	krk_freeVM();
 	return 0;