diff --git a/Known-issues.md b/Known-issues.md
index cd34fae..6ce1948 100644
--- a/Known-issues.md
+++ b/Known-issues.md
@@ -1,2 +1,2 @@
 * **[All]** _Add directory_ button don't support multiselection. QT limitation.
-* **[All]** PNG files using RBGA palette crash conversion. Pillow 2.4.0 bug.
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+* **[Linux/OS X]** PNG files using RBGA palette might crash conversion. Pillow 2.4.0 bug.
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