diff --git a/Known-issues.md b/Known-issues.md
index f8353f0..2bad274 100644
--- a/Known-issues.md
+++ b/Known-issues.md
@@ -1,2 +1,3 @@
 * **[All]** _Add directory_ button don't support multiselection. QT limitation.
+* **[Windows]** Conversion of directory trees that use very long file or directory names will fail.
 * **[Windows]** Application don't work on Windows XP. It is not supported anymore.
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