diff --git a/doc/api/fs.md b/doc/api/fs.md
index 6c8cbf42dc8d4e..db5509e4fd1593 100644
--- a/doc/api/fs.md
+++ b/doc/api/fs.md
@@ -1639,8 +1639,10 @@ Read data from the file specified by `fd`.
 
 `length` is an integer specifying the number of bytes to read.
 
-`position` is an integer specifying where to begin reading from in the file.
-If `position` is `null`, data will be read from the current file position.
+`position` is an argument specifying where to begin reading from in the file.
+If `position` is `null`, data will be read from the current file position,
+and the file position will be updated.
+If `position` is an integer, the file position will remain unchanged.
 
 The callback is given the three arguments, `(err, bytesRead, buffer)`.