diff --git a/src/bootstrap/config.toml.example b/src/bootstrap/config.toml.example
index bf4786ba552ae..9314135050f01 100644
--- a/src/bootstrap/config.toml.example
+++ b/src/bootstrap/config.toml.example
@@ -203,7 +203,7 @@
 #codegen-units = 1
 
 # Whether or not debug assertions are enabled for the compiler and standard
-# library
+# library. Also enables compilation of debug! and trace! logging macros.
 #debug-assertions = false
 
 # Whether or not debuginfo is emitted