diff --git a/plugins/whitelist b/plugins/whitelist
index 3f9c10e..e79da8e 100644
--- a/plugins/whitelist
+++ b/plugins/whitelist
@@ -99,6 +99,7 @@ use strict;
 use warnings;
 
 use Qpsmtpd::Constants;
+use NetAddr::IP;
 
 my $VERSION = 0.02;