diff --git a/bec_widgets/cli/client.py b/bec_widgets/cli/client.py
index f146bc6f..bb532532 100644
--- a/bec_widgets/cli/client.py
+++ b/bec_widgets/cli/client.py
@@ -1844,6 +1844,7 @@ class BECWaveformWidget(RPCBase):
     @rpc_call
     def plot(
         self,
+        arg1: "list | np.ndarray | str | None" = None,
         x: "list | np.ndarray | None" = None,
         y: "list | np.ndarray | None" = None,
         x_name: "str | None" = None,
@@ -1862,6 +1863,7 @@ class BECWaveformWidget(RPCBase):
         """
         Plot a curve to the plot widget.
         Args:
+            arg1(list | np.ndarray | str | None): First argument which can be x data(list | np.ndarray), y data(list | np.ndarray), or y_name(str).
             x(list | np.ndarray): Custom x data to plot.
             y(list | np.ndarray): Custom y data to plot.
             x_name(str): The name of the device for the x-axis.
diff --git a/bec_widgets/widgets/waveform/waveform_widget.py b/bec_widgets/widgets/waveform/waveform_widget.py
index 10cf9fa6..dc573e1e 100644
--- a/bec_widgets/widgets/waveform/waveform_widget.py
+++ b/bec_widgets/widgets/waveform/waveform_widget.py
@@ -204,6 +204,7 @@ class BECWaveformWidget(BECWidget, QWidget):
     @SafeSlot(popup_error=True)
     def plot(
         self,
+        arg1: list | np.ndarray | str | None = None,
         x: list | np.ndarray | None = None,
         y: list | np.ndarray | None = None,
         x_name: str | None = None,
@@ -222,6 +223,7 @@ class BECWaveformWidget(BECWidget, QWidget):
         """
         Plot a curve to the plot widget.
         Args:
+            arg1(list | np.ndarray | str | None): First argument which can be x data(list | np.ndarray), y data(list | np.ndarray), or y_name(str).
             x(list | np.ndarray): Custom x data to plot.
             y(list | np.ndarray): Custom y data to plot.
             x_name(str): The name of the device for the x-axis.
@@ -241,6 +243,7 @@ class BECWaveformWidget(BECWidget, QWidget):
         """
         # self._check_if_scans_have_same_x(enabled=True, x_name_to_check=x_name)
         return self.waveform.plot(
+            arg1=arg1,
             x=x,
             y=y,
             x_name=x_name,
diff --git a/tests/unit_tests/test_waveform_widget.py b/tests/unit_tests/test_waveform_widget.py
index 44185545..3b72164e 100644
--- a/tests/unit_tests/test_waveform_widget.py
+++ b/tests/unit_tests/test_waveform_widget.py
@@ -54,6 +54,7 @@ def test_waveform_widget_set_x(waveform_widget, mock_waveform):
 def test_waveform_plot_data(waveform_widget, mock_waveform):
     waveform_widget.plot(x=[1, 2, 3], y=[1, 2, 3])
     waveform_widget.waveform.plot.assert_called_once_with(
+        arg1=None,
         x=[1, 2, 3],
         y=[1, 2, 3],
         x_name=None,
@@ -73,6 +74,7 @@ def test_waveform_plot_data(waveform_widget, mock_waveform):
 def test_waveform_plot_scan_curves(waveform_widget, mock_waveform):
     waveform_widget.plot(x_name="samx", y_name="samy", dap="GaussianModel")
     waveform_widget.waveform.plot.assert_called_once_with(
+        arg1=None,
         x=None,
         y=None,
         x_name="samx",