diff --git a/src/lib.rs b/src/lib.rs
index 7ad6cb5..2879b75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -35,9 +35,7 @@ pub mod util_net;
     ($($arg:tt)+) => ( rust_util::util_msg::print_debug(&format!($($arg)+)); )
 }
 #[macro_export] macro_rules! opt_value {
-    ($e: expr) => {
-        match $e { Some(o) => o, None => return, }
-    }
+    ($e: expr) => ( match $e { Some(o) => o, None => return, } )
 }
 
 pub type XResult<T> = Result<T, Box<dyn std::error::Error>>;