diff --git a/ccm-core/src/com/arsdigita/loader/mimetypes.properties b/ccm-core/src/com/arsdigita/loader/mimetypes.properties
index 147b208ee..03e3980af 100755
--- a/ccm-core/src/com/arsdigita/loader/mimetypes.properties
+++ b/ccm-core/src/com/arsdigita/loader/mimetypes.properties
@@ -26,7 +26,9 @@
 "application/ms-powerpoint", "Microsoft Powerpoint file", "ppt,pps,pot", "MimeType"
 "application/postscript", "encapsulated PostScript", "ps,eps,ai", "TextMimeType","1"
 "application/rtf", "rich text format", "rtf", "TextMimeType", "1"
-"application/vnd.sun.xml.writer", "OpenOffice Writer", "sxw", "TextMimeType", "1"
+"application/vnd.openxmlformats-officedocument.wordprocessingml.document", "Microsoft Office Open XML Word Document", "docx", "TextMimeType", "1""application/vnd.sun.xml.writer", "OpenOffice Writer", "sxw", "TextMimeType", "1"
+"application/vnd.openxmlformats-officedocument.presentationml.presentation", "Microsoft Office Open XML Powerpoint Document", "pptx", "MimeType"
+"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Microsoft Office Open XML Excel Document", "xlsx", "TextMimeType", "1"
 "application/vnd.sun.xml.writer.template", "OpenOffice Writer Template", "stw", "TextMimeType", "1"
 "application/vnd.sun.xml.calc", "OpenOffice SpreadSheets", "sxc", "TextMimeType", "1"
 "application/vnd.sun.xml.calc.template", "OpenOffice SpreadSheets Template", "stc", "TextMimeType", "1"
@@ -55,4 +57,4 @@
 "image/x-xbitmap", "xbm image", "xbm", "ImageMimeType", ""
 "image/x-xwindowdump", "x-windowdump", "xwd", "ImageMimeType", ""
 "image/bmp", "Windows BMP", "bmp", "ImageMimeType", "com.arsdigita.mimetypes.image.BMPImageSizer"
-"image/png", "PNG image", "png", "ImageMimeType", ""
\ No newline at end of file
+"image/png", "PNG image", "png", "ImageMimeType", ""