diff --git a/encoding/gpkg/binary_header.go b/encoding/gpkg/binary_header.go
index 4400d5d7..7cf0591a 100644
--- a/encoding/gpkg/binary_header.go
+++ b/encoding/gpkg/binary_header.go
@@ -1,3 +1,5 @@
+// +build cgo
+
 package gpkg
 
 import (
diff --git a/encoding/gpkg/binary_header_internal_test.go b/encoding/gpkg/binary_header_internal_test.go
index 7d7f714b..72096748 100644
--- a/encoding/gpkg/binary_header_internal_test.go
+++ b/encoding/gpkg/binary_header_internal_test.go
@@ -1,3 +1,5 @@
+// +build cgo
+
 package gpkg
 
 import (
diff --git a/encoding/gpkg/errors.go b/encoding/gpkg/errors.go
index 44a6586c..bb37f49a 100644
--- a/encoding/gpkg/errors.go
+++ b/encoding/gpkg/errors.go
@@ -1,3 +1,5 @@
+// +build cgo
+
 package gpkg
 
 import "github.com/gdey/errors"
diff --git a/encoding/gpkg/examples/points.go b/encoding/gpkg/examples/points.go
index 61b9ecc8..f1ed8714 100644
--- a/encoding/gpkg/examples/points.go
+++ b/encoding/gpkg/examples/points.go
@@ -1,3 +1,5 @@
+// +build cgo
+
 package main
 
 import (
diff --git a/encoding/gpkg/gpkg.go b/encoding/gpkg/gpkg.go
index 759ab70a..f05c3481 100644
--- a/encoding/gpkg/gpkg.go
+++ b/encoding/gpkg/gpkg.go
@@ -1,3 +1,5 @@
+// +build cgo
+
 package gpkg
 
 import (