diff --git a/core/src/main/resources/lib/hudson/projectView.jelly b/core/src/main/resources/lib/hudson/projectView.jelly
index 731ebbcf76dc9c531c13fbc96a725f867aec6fe5..c34f69d485f9888b2f9fd0325433c514302fd055 100644
--- a/core/src/main/resources/lib/hudson/projectView.jelly
+++ b/core/src/main/resources/lib/hudson/projectView.jelly
@@ -33,8 +33,8 @@ THE SOFTWARE.
     <st:attribute name="jobBaseUrl" type="String">
       The base URL of all job links. Normally ${rootURL}/
     </st:attribute>
-    <st:attribute name="showViewTabs" use="required" type="boolean">
-      If the caller rendered a view tabes, set this to true so that CSS is adjusted accordingly.
+    <st:attribute name="showViewTabs" use="optional" type="boolean">
+      If the caller rendered a view tabes, set this attribute so that CSS is adjusted accordingly.
     </st:attribute>
     <st:attribute name="views" type="Collection&lt;View>">
       If non-null, render nested views.