diff --git a/labscript_devices/SpinnakerCamera/blacs_workers.py b/labscript_devices/SpinnakerCamera/blacs_workers.py
index b5cbc9c0..6bb6d9af 100644
--- a/labscript_devices/SpinnakerCamera/blacs_workers.py
+++ b/labscript_devices/SpinnakerCamera/blacs_workers.py
@@ -234,8 +234,8 @@ def stop_acquisition(self):
         num_frames=self.get_attribute('StreamTotalBufferCount', stream_map=True)
         failed_frames=self.get_attribute('StreamFailedBufferCount', stream_map=True)
         underrun_frames=self.get_attribute('StreamBufferUnderrunCount', stream_map=True)
-        print('Stream info: %d frames acquired, %d failed, %d underrun' %
-              (num_frames, failed_frames, underrun_frames))
+        print('Stream info: %s frames acquired, %s failed, %s underrun' %
+              (str(num_frames), str(failed_frames), str(underrun_frames)))
 
     def abort_acquisition(self):
         print('Stopping acquisition...')