diff --git a/src/doc/unstable-book/src/library-features/allocator_api.md b/src/doc/unstable-book/src/library-features/allocator-api.md
similarity index 100%
rename from src/doc/unstable-book/src/library-features/allocator_api.md
rename to src/doc/unstable-book/src/library-features/allocator-api.md