diff --git a/CHANGES.rst b/CHANGES.rst
index 12f2b31..ad52518 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -23,6 +23,7 @@ Bug fixes
 - Fix weighting of :func:`xoa.filter.convolve`.
 - Fix :func:`xoa.grid.to_rect` raising of errors and handling of missing data in coordinates.
 - Fix string formatting in :func:`xoa.filter.tidal_filter` warning.
+- Fix default value of `deltadens` in :func:`xoa.thermdyn.mixed_layer_depth`
 
 Documentation
 -------------
diff --git a/xoa/thermdyn.py b/xoa/thermdyn.py
index a76ff99..785aa67 100644
--- a/xoa/thermdyn.py
+++ b/xoa/thermdyn.py
@@ -246,7 +246,7 @@ def mixed_layer_depth(
     method=None,
     zref=0.0,
     deltatemp=0.2,
-    deltadens=0.3,
+    deltadens=0.03,
     kzmax=0.0005,
     zdim=None,
     dask="parallelized",