diff --git a/public/css/icinga/responsive.less b/public/css/icinga/responsive.less
index bf6908802..a5d2b662c 100644
--- a/public/css/icinga/responsive.less
+++ b/public/css/icinga/responsive.less
@@ -150,11 +150,11 @@
 // Safe areas for iPhone X
 
 #header, #sidebar, #footer {
-  padding-left: constant(safe-area-inset-left);
+  padding-left: env(safe-area-inset-left);
 }
 
 #main, #footer {
-  padding-right: constant(safe-area-inset-right);
+  padding-right: env(safe-area-inset-right);
 }
 
 #layout.twocols #col2 {