diff --git a/app/models/metadata_array.rb b/app/models/metadata_array.rb
index 0527ccb8..368aa546 100644
--- a/app/models/metadata_array.rb
+++ b/app/models/metadata_array.rb
@@ -28,7 +28,7 @@ class MetadataArray < MetadataTemplate
   #
   # @return [Array]
   def document_value
-    [super].flatten(1)
+    [super].flatten(1).compact
   end
 
   alias indexable_values value