diff --git a/features/FEATURE_BLE/targets/TARGET_CORDIO/driver/H4TransportDriver.h b/features/FEATURE_BLE/targets/TARGET_CORDIO/driver/H4TransportDriver.h
index e90325b472..ff1e743fca 100644
--- a/features/FEATURE_BLE/targets/TARGET_CORDIO/driver/H4TransportDriver.h
+++ b/features/FEATURE_BLE/targets/TARGET_CORDIO/driver/H4TransportDriver.h
@@ -69,7 +69,7 @@ public:
 private:
     void on_controller_irq();
 
-    Serial uart;
+    RawSerial uart;
     PinName cts;
     PinName rts;
 };