diff --git a/app/models/metadata_boolean.rb b/app/models/metadata_boolean.rb
index ed27ea92..90c002a7 100644
--- a/app/models/metadata_boolean.rb
+++ b/app/models/metadata_boolean.rb
@@ -25,10 +25,14 @@ class MetadataBoolean < MetadataTemplate
   # * false
   # * true
   def value
-    return document.data.fetch(name.to_s, default_value) if self[:value].nil?
-    return self[:value] unless self[:value].is_a? String
-
-    self[:value] = true_values.include? self[:value]
+    case self[:value]
+    when NilClass
+      document.data.fetch(name.to_s, default_value)
+    when String
+      true_values.include? self[:value]
+    else
+      self[:value]
+    end
   end
 
   # Siempre guardar el valor de este campo a menos que sea nulo