1 files changed, 1 insertions, 0 deletions
diff --git a/ext/dl/lib/dl.rb b/ext/dl/lib/dl.rb
index 80d46b685a..b34bb82f41 100644
--- a/ext/dl/lib/dl.rb
+++ b/ext/dl/lib/dl.rb
@@ -6,6 +6,7 @@ rescue LoadError
 end
 
 module DL
+  # Returns true if DL is using Fiddle, the libffi wrapper.
   def self.fiddle?
     Object.const_defined?(:Fiddle)
   end