diff --git a/doc/api/fs.md b/doc/api/fs.md
index dfe4f55b52b5a6..1b2a3c791532c0 100644
--- a/doc/api/fs.md
+++ b/doc/api/fs.md
@@ -1415,7 +1415,7 @@ changes:
 -->
 
 * `fd` {integer}
-* `buffer` {string|Buffer|Uint8Array}
+* `buffer` {Buffer|Uint8Array}
 * `offset` {integer}
 * `length` {integer}
 * `position` {integer}