diff --git a/src/machine/board_particle_argon.go b/src/machine/board_particle_argon.go
index 5113a680..dc5df0f7 100644
--- a/src/machine/board_particle_argon.go
+++ b/src/machine/board_particle_argon.go
@@ -40,9 +40,12 @@ const (
 )
 
 // UART
+var (
+	Serial = USB
+	UART0  = NRF_UART0
+)
+
 const (
-	Serial          = USB
-	UART0           = NRF_UART0
 	UART_TX_PIN Pin = 6
 	UART_RX_PIN Pin = 8
 )
diff --git a/src/machine/board_particle_boron.go b/src/machine/board_particle_boron.go
index 24698520..1a2d1331 100644
--- a/src/machine/board_particle_boron.go
+++ b/src/machine/board_particle_boron.go
@@ -40,9 +40,12 @@ const (
 )
 
 // UART
+var (
+	Serial = USB
+	UART0  = NRF_UART0
+)
+
 const (
-	Serial          = USB
-	UART0           = NRF_UART0
 	UART_TX_PIN Pin = 6
 	UART_RX_PIN Pin = 8
 )
diff --git a/src/machine/board_particle_xenon.go b/src/machine/board_particle_xenon.go
index 601bb42f..fe6fe498 100644
--- a/src/machine/board_particle_xenon.go
+++ b/src/machine/board_particle_xenon.go
@@ -40,9 +40,12 @@ const (
 )
 
 // UART
+var (
+	Serial = USB
+	UART0  = NRF_UART0
+)
+
 const (
-	Serial          = USB
-	UART0           = NRF_UART0
 	UART_TX_PIN Pin = 6
 	UART_RX_PIN Pin = 8
 )