diff --git a/obci_brainflow_lsl.py b/obci_brainflow_lsl.py
index 55739d8..642f3d8 100644
--- a/obci_brainflow_lsl.py
+++ b/obci_brainflow_lsl.py
@@ -36,7 +36,7 @@
                  "x5060110X", "x6060110X", "x7060110X", "x8060110X", # channels 5-8   /Cyton
                  "xQ060110X", "xW060110X", "xE060110X", "xR060110X", # channels 9-12  /Daisy
                  "xT060110X", "xY060110X", "xU060110X", "xI060110X") # channels 13-16 /Daisy
-BOARD_N_CHANNELS = {0: 8, 5: 8, 2: 16, 6: 16} # Cyton or Cyton + Daisy
+BOARD_N_CHANNELS = {-1: 16, 0: 8, 5: 8, 2: 16, 6: 16} # Synthetic board, Cyton or Cyton + Daisy
 ALLOWED_DATA_TYPES = ['EXG', 'AUX']
 REQUIRED_ARGS = ("board_id", "name", "data_type", "channel_names", "uid", "max_time")
 REQUIRED_ARDUINO = ("name", "type", "channel_count", "channel_format", "source_id")
@@ -361,4 +361,4 @@ def main(argv):
 # ==== start the program ====
 if __name__ == "__main__":
     stop_event = threading.Event()
-    main(sys.argv[1:])
\ No newline at end of file
+    main(sys.argv[1:])