diff -bu ./lib/MooseX/Types/Combine.pm~ ./lib/MooseX/Types/Combine.pm
--- ./lib/MooseX/Types/Combine.pm~	2017-02-07 19:59:35.000000000 +0100
+++ ./lib/MooseX/Types/Combine.pm	2017-05-15 11:15:42.000000000 +0200
@@ -120,6 +120,7 @@
         $class->_check_type_lib($_) for @libs;
         @$store = @libs;
 
+        no strict 'hashpairs';
         my %types = map {
             my $lib = $_;
             map +( $_ => $lib ), $lib->type_names