diff --git a/gui/src/aaregui/panels/rotation_data_collection.py b/gui/src/aaregui/panels/rotation_data_collection.py
index de9d53d1..3e3ac470 100644
--- a/gui/src/aaregui/panels/rotation_data_collection.py
+++ b/gui/src/aaregui/panels/rotation_data_collection.py
@@ -123,7 +123,7 @@ class RotationDataCollectionPanel(ScanSettingsPanel):
     @Slot()
     def run_measurement(self):
         r = RotationScanRequest(
-            file_prefix=self._filename, #str(add_data_to_path(self._filename)),
+            file_prefix=str(add_data_to_path(self._filename)), #self._filename,
             start_omega_deg=self.start_angle.value,
             steps=self.image_number(),
             incr_omega_deg=self.image_angle.value,