diff --git a/apps/files/js/semaphore.js b/apps/files/js/semaphore.js
index 044f0af23f..aa327e0f8a 100644
--- a/apps/files/js/semaphore.js
+++ b/apps/files/js/semaphore.js
@@ -32,6 +32,10 @@
 		};
 	};
 
+	// needed on public share page to properly register this
+	if (!OCA.Files) {
+		OCA.Files = {};
+	}
 	OCA.Files.Semaphore = Semaphore;
 
 })();
diff --git a/apps/files_sharing/lib/Controller/ShareController.php b/apps/files_sharing/lib/Controller/ShareController.php
index 3bd65cd397..0725e520b2 100644
--- a/apps/files_sharing/lib/Controller/ShareController.php
+++ b/apps/files_sharing/lib/Controller/ShareController.php
@@ -412,6 +412,7 @@ class ShareController extends AuthPublicShareController {
 		}
 
 		// Load files we need
+		\OCP\Util::addScript('files', 'semaphore');
 		\OCP\Util::addScript('files', 'file-upload');
 		\OCP\Util::addStyle('files_sharing', 'publicView');
 		\OCP\Util::addScript('files_sharing', 'public');