diff --git a/lib/analyzers/implicit_json_schema.rb b/lib/analyzers/implicit_json_schema.rb
index 403bbf9..c074fec 100644
--- a/lib/analyzers/implicit_json_schema.rb
+++ b/lib/analyzers/implicit_json_schema.rb
@@ -36,7 +36,7 @@ def merge(other_schema)
     other_attributes.each do |attribute, value|
       # if the other schema has a nil for an attribute, then throw that away, because
       # it means the attribute was never classified
-      unless value
+      if value.nil?
         other_attributes.delete(attribute)
         next
       end