reference: "ffi" is normally in upper case

diff --git a/src/doc/reference.md b/src/doc/reference.md
index 83849574260e1ff93034292314a991f962be5935..046462e0807790d900eb0e492ae59ce08facc814 100644 (file)
--- a/src/doc/reference.md
+++ b/src/doc/reference.md
@@ -3931,7 +3931,7 @@ initialized; this is enforced by the compiler.
 The Rust compiler supports various methods to link crates together both
 statically and dynamically. This section will explore the various methods to
 link Rust crates together, and more information about native libraries can be
-found in the [ffi section of the book][ffi].
+found in the [FFI section of the book][ffi].
 
 In one session of compilation, the compiler can generate multiple artifacts
 through the usage of either command line flags or the `crate_type` attribute.