diff --git a/lib/pure/os.nim b/lib/pure/os.nim
index e90d3c514e..d54dc5b837 100644
--- a/lib/pure/os.nim
+++ b/lib/pure/os.nim
@@ -2038,6 +2038,7 @@ iterator walkDir*(dir: string; relative = false, checkDir = false):
   ## Example: This directory structure::
   ##   dirA / dirB / fileB1.txt
   ##        / dirC
+  ##        / fileA1.txt
   ##        / fileA2.txt
   ##
   ## and this code: