diff --git a/PowerEditor/src/NppIO.cpp b/PowerEditor/src/NppIO.cpp
index e3d1cdcac..505e854fb 100644
--- a/PowerEditor/src/NppIO.cpp
+++ b/PowerEditor/src/NppIO.cpp
@@ -1901,8 +1901,9 @@ bool Notepad_plus::fileRename(BufferID id)
 		// So just rename the tab and rename the backup file too if applicable
 
 		// https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file
-		// Reserved characters: < > : " / \ | ? *
-		std::wstring reservedChars = TEXT("<>:\"/\\|\?*");
+		// Reserved characters:  < > : " / \ | ? * tab  
+		//  ("tab" is not in the official list, but it is good to avoid it)
+		std::wstring reservedChars = TEXT("<>:\"/\\|\?*\t");
 
 		std::wstring staticName = _nativeLangSpeaker.getLocalizedStrFromID("tabrename-newname", L"New name");