diff --git a/lib/codegen/src/binemit/memorysink.rs b/lib/codegen/src/binemit/memorysink.rs
index 6871dc0942..fa4aacc233 100644
--- a/lib/codegen/src/binemit/memorysink.rs
+++ b/lib/codegen/src/binemit/memorysink.rs
@@ -68,6 +68,9 @@ pub trait RelocSink {
 }
 
 /// A trait for receiving trap codes and offsets.
+///
+/// If you don't need information about possible traps, you can use the
+/// [`NullTrapSink`](binemit/trait.TrapSink.html) implementation.
 pub trait TrapSink {
     /// Add trap information for a specific offset.
     fn trap(&mut self, CodeOffset, SourceLoc, TrapCode);