diff --git a/public/css/icinga/forms.less b/public/css/icinga/forms.less
index 1aaf29471..4ad00d6b4 100644
--- a/public/css/icinga/forms.less
+++ b/public/css/icinga/forms.less
@@ -152,7 +152,7 @@ form.icinga-form {
   input[type="time"],
   textarea,
   select {
-    flex: 1;
+    flex: 1 1 auto;
     width: 0;
   }
 }