diff --git a/src/spikeinterface/extractors/mdaextractors.py b/src/spikeinterface/extractors/mdaextractors.py
index abdbff38e7..b2c260e1b9 100644
--- a/src/spikeinterface/extractors/mdaextractors.py
+++ b/src/spikeinterface/extractors/mdaextractors.py
@@ -91,7 +91,7 @@ def write_recording(
             File name of raw file. Defaults to 'raw.mda'.
         params_fname: str, default: 'params.json'
             File name of params file. Defaults to 'params.json'.
-        geom_fname: str, default 'geom.csv'
+        geom_fname: str, default: 'geom.csv'
             File name of geom file. Defaults to 'geom.csv'.
         dtype: dtype or None, default None
             Data type to be used. If None dtype is same as recording traces.