From 9ff647a0d1565aa95069a5fc876b57cb35d6da16 Mon Sep 17 00:00:00 2001
From: XAMPPRocky <4464295+XAMPPRocky@users.noreply.github.com>
Date: Wed, 14 Oct 2020 14:46:30 +0200
Subject: [PATCH] Update codegen-backend.md

---
 src/doc/unstable-book/src/compiler-flags/codegen-backend.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/doc/unstable-book/src/compiler-flags/codegen-backend.md b/src/doc/unstable-book/src/compiler-flags/codegen-backend.md
index efccff42caa..87b2184676a 100644
--- a/src/doc/unstable-book/src/compiler-flags/codegen-backend.md
+++ b/src/doc/unstable-book/src/compiler-flags/codegen-backend.md
@@ -8,8 +8,8 @@ This feature allows you to specify a path to a dynamic library to use as rustc's
 code generation backend at runtime.
 
 Set the `-Zcodegen-backend=<path>` compiler flag to specify the location of the
-backend. The library must contain a function named `__rustc_codegen_backend`
-with a signature of `fn() -> Box<dyn rustc_codegen_ssa::traits::CodegenBackend>`.
+backend. The library must be of crate type `dylib` and must contain a function
+named `__rustc_codegen_backend` with a signature of `fn() -> Box<dyn rustc_codegen_ssa::traits::CodegenBackend>`.
 
 ## Example
 ```rust,ignore