diff --git a/c_os/user/devices/SerialOut.h b/c_os/user/devices/SerialOut.h
index 92939b6..4cca2dc 100644
--- a/c_os/user/devices/SerialOut.h
+++ b/c_os/user/devices/SerialOut.h
@@ -16,7 +16,9 @@ private:
     int is_transmit_empty();
 
 public:
-    SerialOut() : com1(0x3f8) {}
+    SerialOut() : com1(0x3f8) {
+        this->init();
+    }
 
     int init() const;