diff --git a/plugin_export_notwin.go b/plugin_export_notwin.go
index 30056be..8f5b384 100644
--- a/plugin_export_notwin.go
+++ b/plugin_export_notwin.go
@@ -1,3 +1,4 @@
+// +build plugin
 // +build !windows
 
 package vst2
diff --git a/plugin_export_windows.go b/plugin_export_windows.go
index 806bc43..ffe52ba 100644
--- a/plugin_export_windows.go
+++ b/plugin_export_windows.go
@@ -1,3 +1,5 @@
+// +build plugin
+
 package vst2
 
 import (