diff --git a/middleman-core/lib/middleman-core/core_extensions/data.rb b/middleman-core/lib/middleman-core/core_extensions/data.rb
index 2f866ac0..c2fad38c 100644
--- a/middleman-core/lib/middleman-core/core_extensions/data.rb
+++ b/middleman-core/lib/middleman-core/core_extensions/data.rb
@@ -187,7 +187,7 @@ module Middleman
         end
 
         def key?(key)
-          @local_data.key?(key.to_s) || data_for_path(key)
+          ( @local_data.keys + @local_sources.keys + @callback_sources.keys ).include?(key.to_s)
         end
 
         alias_method :has_key?, :key?