diff --git a/drivers/bookmarklet/js/apps.js b/drivers/bookmarklet/js/apps.js
index f34085517..d7c19c2c0 100644
--- a/drivers/bookmarklet/js/apps.js
+++ b/drivers/bookmarklet/js/apps.js
@@ -2632,7 +2632,7 @@ var json =
 			"cats": [ 11 ],
 			"html": "<iframe src=\"[^>]+tumblr\\.com",
 			"url": "^https?://(?:www\\.)?[^/]+\\.tumblr\\.com/",
-			"headers": { "X-Tumblr-Usec": ".*" }
+			"headers": { "X-Tumblr-User": ".*" }
 		},
 		"TWiki": {
 			"website": "twiki.org",
diff --git a/share/apps.json b/share/apps.json
index 8ba7da806..260e09947 100644
--- a/share/apps.json
+++ b/share/apps.json
@@ -2655,7 +2655,7 @@
 			"cats": [ 11 ],
 			"html": "<iframe src=\"[^>]+tumblr\\.com",
 			"url": "^https?://(?:www\\.)?[^/]+\\.tumblr\\.com/",
-			"headers": { "X-Tumblr-Usec": ".*" }
+			"headers": { "X-Tumblr-User": ".*" }
 		},
 		"TWiki": {
 			"website": "twiki.org",