diff --git a/public/css/icinga/base.less b/public/css/icinga/base.less
index 72f583df4..5baaa9d00 100644
--- a/public/css/icinga/base.less
+++ b/public/css/icinga/base.less
@@ -65,7 +65,7 @@
 
 // Font sizes
 @font-size: 0.750em; // 12px
-@font-size-small: 0.917em; // 11px
+@font-size-small: 11/12em; // 11px
 @font-size-dashboard: 3.5em; // 56px
 @font-size-dashboard-small: 1.1em; // 17px
 @font-weight-bold: 600;