diff --git a/src/libusbdevice.cpp b/src/libusbdevice.cpp
index 4ffcc2d..569d8e8 100644
--- a/src/libusbdevice.cpp
+++ b/src/libusbdevice.cpp
@@ -39,6 +39,7 @@ bool LibUsbDevice::sendDataToDevice(const Data &data)
 {
     if (!m_device) {
         std::cerr << "Device not opened" << std::endl;
+        return false;
     }
 
     auto requestType = LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_RECIPIENT_INTERFACE;