diff --git a/css/mobile.css b/css/mobile.css
index 70776cc77..f2b2c57f9 100644
--- a/css/mobile.css
+++ b/css/mobile.css
@@ -13,6 +13,7 @@
 
 	#richdocumentsframe {
 		height: 100vh;
+		position: fixed;
 	}
 
 }