diff --git a/Makefile.PL b/Makefile.PL
index ee5a5ca..6a287d0 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -3,6 +3,7 @@ use 5.006;
 use strict;
 use ExtUtils::MakeMaker;
 use Config;
+use File::Spec;
 
 # Some dependencies need to be more aggressive on Windows
 sub WINLIKE () {