diff --git a/lib/puppet/parser/functions/intersection.rb b/lib/puppet/parser/functions/intersection.rb
index b46ca58a0..6d9d104eb 100644
--- a/lib/puppet/parser/functions/intersection.rb
+++ b/lib/puppet/parser/functions/intersection.rb
@@ -22,7 +22,7 @@ module Puppet::Parser::Functions
     second = arguments[1]
 
     unless first.is_a?(Array) && second.is_a?(Array)
-      raise(Puppet::ParseError, 'intersection(): Requires 2 arrays')
+      raise(Puppet::ParseError, "intersection(): Requires 2 arrays, got #{first.class} and #{second.class}")
     end
 
     result = first & second