diff --git a/.aspell.en.pws b/.aspell.en.pws
index 82cc6dd9..63469448 100644
--- a/.aspell.en.pws
+++ b/.aspell.en.pws
@@ -409,6 +409,7 @@ WinXp
 wmf
 WrapText
 xfIndexNumber
+xls
 XLS
 XlsFormatReader
 xlsx