diff --git a/src/devices/arduino/printable_serial.cpp b/src/devices/arduino/printable_serial.cpp
index ee3acc0..f9ee624 100644
--- a/src/devices/arduino/printable_serial.cpp
+++ b/src/devices/arduino/printable_serial.cpp
@@ -12,6 +12,7 @@ namespace sta
           mutex_{mutex}
     {
         Serial.begin(baud);
+        while (!Serial);
     }
 
     void PrintableSerial::print(const char * str, size_t length)