diff --git a/doc/README.md b/doc/README.md
index 0323c70..a73ad72 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -2,7 +2,7 @@ xxHash Specification
 =======================
 
 This directory contains material defining the xxHash algorithm.
-It's described in [this specification document](xxhash_spec.md_).
+It's described in [this specification document](xxhash_spec.md).
 
 The algorithm is also be illustrated by a [simple educational library](https://github.com/easyaspi314/xxhash-clean),
 written by @easyaspi314 and designed for readability