diff --git a/service_aix.go b/service_aix.go
index af7e20c..515e3df 100644
--- a/service_aix.go
+++ b/service_aix.go
@@ -1,3 +1,5 @@
+//+build aix
+
 // Copyright 2015 Daniel Theophanes.
 // Use of this source code is governed by a zlib-style
 // license that can be found in the LICENSE file.