diff --git a/features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96_CellularStack.cpp b/features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96_CellularStack.cpp
index 7b5003e4bf..11b0b70731 100644
--- a/features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96_CellularStack.cpp
+++ b/features/cellular/framework/targets/QUECTEL/BG96/QUECTEL_BG96_CellularStack.cpp
@@ -70,7 +70,7 @@ nsapi_error_t QUECTEL_BG96_CellularStack::socket_connect(nsapi_socket_t handle,
         if ((_at.get_last_error() == NSAPI_ERROR_OK) && err) {
             if (err == BG96_SOCKET_BIND_FAIL) {
                 socket->created = false;
-				_at.unlock();
+                _at.unlock();
                 return NSAPI_ERROR_PARAMETER;
             }
             _at.cmd_start("AT+QICLOSE=");