Macro parsing
diff --git a/src/attr.rs b/src/attr.rs
index 1f16ab3..fa021d7 100644
--- a/src/attr.rs
+++ b/src/attr.rs
@@ -165,7 +165,7 @@
         |
         do_parse!(
             option!(whitespace) >>
-            peek!(tag!("/**")) >>
+            peek!(tuple!(tag!("/**"), not!(tag!("*")))) >>
             com: block_comment >>
             (Attribute {
                 style: AttrStyle::Outer,