diff --git a/examples/base64.c b/examples/base64.c
index 6c4db9e..cdb088e 100644
--- a/examples/base64.c
+++ b/examples/base64.c
@@ -24,7 +24,7 @@ void init_parser(void)
                                                            base64_1, NULL)),
                                        NULL);
 
-    document = base64;
+    document = h_sequence(h_whitespace(base64), h_whitespace(h_end_p()), NULL);
 }