diff --git a/features/cellular/framework/AT/ATHandler.cpp b/features/cellular/framework/AT/ATHandler.cpp
index cc167388c5..44c7ec832d 100644
--- a/features/cellular/framework/AT/ATHandler.cpp
+++ b/features/cellular/framework/AT/ATHandler.cpp
@@ -65,8 +65,6 @@ ATHandler::ATHandler(FileHandle *fh, EventQueue &queue, int timeout, const char
     _last_err(NSAPI_ERROR_OK),
     _last_3gpp_error(0),
     _oob_string_max_length(0),
-    _output_delimiter("\r"),
-    _output_delimiter_length(1),
     _oobs(NULL),
     _at_timeout(timeout),
     _previous_at_timeout(timeout),
diff --git a/features/cellular/framework/AT/ATHandler.h b/features/cellular/framework/AT/ATHandler.h
index f0edba5b73..ed46d82eb0 100644
--- a/features/cellular/framework/AT/ATHandler.h
+++ b/features/cellular/framework/AT/ATHandler.h
@@ -73,7 +73,7 @@ public:
      *  @param fh               file handle used for reading AT responses and writing AT commands
      *  @param queue            Event queue used to transfer sigio events to this thread
      *  @param timeout          Timeout when reading for AT response
-     *  @param output_delimiter Default delimiter used when parsing at responses
+     *  @param output_delimiter delimiter used when parsing at responses, "\r" should be used as output_delimiter
      */
     ATHandler(FileHandle *fh, events::EventQueue &queue, int timeout, const char *output_delimiter);
     ~ATHandler();
diff --git a/features/cellular/framework/AT/AT_CellularDevice.cpp b/features/cellular/framework/AT/AT_CellularDevice.cpp
index 37efdc9bd4..dff3d072f1 100644
--- a/features/cellular/framework/AT/AT_CellularDevice.cpp
+++ b/features/cellular/framework/AT/AT_CellularDevice.cpp
@@ -60,7 +60,7 @@ ATHandler* AT_CellularDevice::get_at_handler(FileHandle *fileHandle)
         atHandler = atHandler->_nextATHandler;
     }
 
-    atHandler = new ATHandler(fileHandle, _queue, _default_timeout);
+    atHandler = new ATHandler(fileHandle, _queue, _default_timeout, "\r");
     if (atHandler) {
         atHandler->_nextATHandler = _atHandlers;
         _atHandlers = atHandler;