diff --git a/src/fw-update/fw-update-device.cpp b/src/fw-update/fw-update-device.cpp
index fb1cf327e4c..ef5db5f413e 100644
--- a/src/fw-update/fw-update-device.cpp
+++ b/src/fw-update/fw-update-device.cpp
@@ -189,7 +189,7 @@ namespace librealsense
         , _product_line( product_line )
         , _serial_number( mipi_device->get_info().serial_number )
     {
-        std::ifstream fw_path_in_device(_physical_port);
+        std::ifstream fw_path_in_device(_physical_port.c_str());
         if (!fw_path_in_device)
         {
             throw std::runtime_error("Firmware Update failed - wrong path or permissions missing");