diff --git a/public/css/icinga/responsive.less b/public/css/icinga/responsive.less
index 272bc40c4..1191616b3 100644
--- a/public/css/icinga/responsive.less
+++ b/public/css/icinga/responsive.less
@@ -3,7 +3,7 @@
 // Not growing larger than 3840px at 1em=16px right now
 @media screen and (min-width: 240em) {
   #header {
-    width: 240em;
+    min-width: 240em;
   }
 
   #main {