diff --git a/platforms/firmata/ble_firmata_adaptor.go b/platforms/firmata/ble_firmata_adaptor.go
index 64735c86..e892e173 100644
--- a/platforms/firmata/ble_firmata_adaptor.go
+++ b/platforms/firmata/ble_firmata_adaptor.go
@@ -1,4 +1,4 @@
-// build !windows
+// +build !windows
 
 package firmata
 
diff --git a/platforms/firmata/ble_firmata_adaptor_test.go b/platforms/firmata/ble_firmata_adaptor_test.go
index f489ede2..2f8a8dbb 100644
--- a/platforms/firmata/ble_firmata_adaptor_test.go
+++ b/platforms/firmata/ble_firmata_adaptor_test.go
@@ -1,4 +1,4 @@
-// build !windows
+// +build !windows
 
 package firmata