diff --git a/src/doc/src/reference/manifest.md b/src/doc/src/reference/manifest.md
index 3642ab47603..bac6093f46a 100644
--- a/src/doc/src/reference/manifest.md
+++ b/src/doc/src/reference/manifest.md
@@ -112,7 +112,7 @@ brackets at the end of each author.
 
 You can opt in to a specific [Rust Edition] for your package with the
 `edition` key in `Cargo.toml`. If you don't specify the edition, it will
-default to 2018.
+default to 2015.
 
 ```toml
 [package]