diff --git a/firewall/interception/windowskext/doc.go b/firewall/interception/windowskext/doc.go
new file mode 100644
index 00000000..dc37d6a3
--- /dev/null
+++ b/firewall/interception/windowskext/doc.go
@@ -0,0 +1,4 @@
+// +build windows
+
+// Package windowskext provides network interception capabilites on windows via the Portmaster Kernel Extension.
+package windowskext
diff --git a/firewall/interception/windowskext/handler.go b/firewall/interception/windowskext/handler.go
index 026fab08..4419f157 100644
--- a/firewall/interception/windowskext/handler.go
+++ b/firewall/interception/windowskext/handler.go
@@ -1,3 +1,4 @@
+// +build windows
 package windowskext
 
 import (
diff --git a/firewall/interception/windowskext/kext.go b/firewall/interception/windowskext/kext.go
index c1828772..96800b06 100644
--- a/firewall/interception/windowskext/kext.go
+++ b/firewall/interception/windowskext/kext.go
@@ -1,3 +1,4 @@
+// +build windows
 package windowskext
 
 import (
diff --git a/firewall/interception/windowskext/packet.go b/firewall/interception/windowskext/packet.go
index d45444b2..98cf0985 100644
--- a/firewall/interception/windowskext/packet.go
+++ b/firewall/interception/windowskext/packet.go
@@ -1,3 +1,4 @@
+// +build windows
 package windowskext
 
 import (