diff --git a/Python/compile.c b/Python/compile.c
index 2c58d44..62fa46c 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1660,6 +1660,11 @@
 	if (!compiler_enter_scope(c, name, (void *)e, e->lineno))
 		return 0;
 
+	/* Make None the first constant, so the lambda can't have a
+	   docstring. */
+	if (compiler_add_o(c, c->u->u_consts, Py_None) < 0)
+		return 0;
+	
 	c->u->u_argcount = asdl_seq_LEN(args->args);
 	c->u->u_kwonlyargcount = asdl_seq_LEN(args->kwonlyargs);
 	VISIT_IN_SCOPE(c, expr, e->v.Lambda.body);