diff --git a/chrome/content/zotero/xpcom/attachments.js b/chrome/content/zotero/xpcom/attachments.js
index 5d371d48af..86a53a1a82 100644
--- a/chrome/content/zotero/xpcom/attachments.js
+++ b/chrome/content/zotero/xpcom/attachments.js
@@ -566,7 +566,7 @@ Zotero.Attachments = new function(){
 				};
 			}
 			
-			if (mimeType == 'text/html') {
+			if (mimeType === 'text/html' || mimeType === 'application/xhtml+xml') {
 				var sync = true;
 				
 				// Load WebPageDump code
diff --git a/chrome/content/zotero/xpcom/mime.js b/chrome/content/zotero/xpcom/mime.js
index 53d0135e3f..316c1652ce 100644
--- a/chrome/content/zotero/xpcom/mime.js
+++ b/chrome/content/zotero/xpcom/mime.js
@@ -109,6 +109,7 @@ Zotero.MIME = new function(){
 		// Enforce some extensions
 		switch (mimeType) {
 			case 'text/html':
+			case 'application/xhtml+xml':
 				return 'html';
 			
 			case 'application/pdf':