diff --git a/templates/book.jinja b/templates/book.jinja
index 7d94837..3664de3 100644
--- a/templates/book.jinja
+++ b/templates/book.jinja
@@ -148,7 +148,7 @@ user_deleted : {{ user_deleted }}
 
     {{ log_output(list_package_installs)  }}
     
-    {% if list_package_installs|length = 0 %} 
+    {% if list_package_installs|length == 0 %} 
       <mark>
       Today no new packages were installed...
       </mark>