diff --git a/src/plugins/cvs.c b/src/plugins/cvs.c
index f595662..3c3959b 100644
--- a/src/plugins/cvs.c
+++ b/src/plugins/cvs.c
@@ -619,6 +619,8 @@ static void _cvs_task_close_channel(CVSTask * task, GIOChannel * channel)
 
 /* callbacks */
 /* cvs_on_add */
+static gboolean _add_is_binary(char const * type);
+
 static void _cvs_on_add(gpointer data)
 {
 	BrowserPlugin * plugin = data;
@@ -635,8 +637,8 @@ static void _cvs_on_add(gpointer data)
 	basename = g_path_get_basename(cvs->filename);
 	argv[3] = basename;
 	mime = plugin->helper->get_mime(plugin->helper->browser);
-	if((type = mime_type(mime, cvs->filename)) == NULL
-			|| strncmp("text/", type, 5) != 0)
+	type = mime_type(mime, cvs->filename);
+	if(_add_is_binary(type))
 	{
 		argv[4] = argv[3];
 		argv[3] = argv[2];
@@ -647,6 +649,25 @@ static void _cvs_on_add(gpointer data)
 	g_free(dirname);
 }
 
+static gboolean _add_is_binary(char const * type)
+{
+	char const text[] = "text/";
+	char const * types[] = { "application/x-perl",
+		"application/x-shellscript",
+		"application/xml",
+		"application/xslt+xml" };
+	size_t i;
+
+	if(type == NULL)
+		return TRUE;
+	if(strncmp(text, type, sizeof(text) - 1) == 0)
+		return FALSE;
+	for(i = 0; i < sizeof(types) / sizeof(*types); i++)
+		if(strcmp(types[i], type) == 0)
+			return FALSE;
+	return TRUE;
+}
+
 
 /* cvs_on_commit */
 static void _cvs_on_commit(gpointer data)
diff --git a/src/plugins/preview.c b/src/plugins/preview.c
index 250cc9d..c410dff 100644
--- a/src/plugins/preview.c
+++ b/src/plugins/preview.c
@@ -169,7 +169,8 @@ static void _preview_refresh(BrowserPlugin * plugin, char const * path)
 	char const text[] = "text/";
 	char const * types[] = { "application/x-perl",
 		"application/x-shellscript",
-		"application/xml" };
+		"application/xml",
+		"application/xslt+xml" };
 	char const * type;
 	size_t i;