diff --git a/vlib/os/os.v b/vlib/os/os.v
index b7201209ff79f3..d70bdf0d09c5f8 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -276,7 +276,7 @@ pub fn file_name(opath string) string {
 }
 
 // input_opt returns a one-line string from stdin, after printing a prompt.
-// In the event of error (end of input), it returns `none`.
+// Returns `none` in case of an error (end of input).
 pub fn input_opt(prompt string) ?string {
 	print(prompt)
 	flush()