diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index 0e381c71..6ff2408e 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -411,8 +411,13 @@ int PISerial::convertSpeed(PISerial::Speed speed) {
 	case S4000000: return B4000000;
 	default: break;
 	}
+#ifdef WINDOWS
+	piCoutObj << "Warning: Custom speed" << (int)speed;
+	return (int)speed;
+#else
 	piCoutObj << "Warning: Unknown speed" << (int)speed << ", using 115200";
 	return B115200;
+#endif
 }