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-rw-r--r--src/libstd/macros.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index b36473d9b75..de46fedaebb 100644
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -631,7 +631,7 @@ pub mod builtin {
     #[macro_export]
     macro_rules! module_path { () => ({ /* compiler built-in */ }) }
 
-    /// Boolean evaluation of configuration flags.
+    /// Boolean evaluation of configuration flags, at compile-time.
     ///
     /// In addition to the `#[cfg]` attribute, this macro is provided to allow
     /// boolean expression evaluation of configuration flags. This frequently