diff --git a/regional_mom6/regional_mom6.py b/regional_mom6/regional_mom6.py
index 24c2cb4e..7095289b 100644
--- a/regional_mom6/regional_mom6.py
+++ b/regional_mom6/regional_mom6.py
@@ -479,7 +479,7 @@ def hyperbolictan_thickness_profile(
 
     assert np.isclose(total_depth, nlayers * (bottom_layer_thickness + top_layer_thickness) / 2, atol=atol)
 
-    if total_depth == target_depth:
+    if np.isclose(total_depth, target_depth, atol=atol):
         return layer_thicknesses
     else:
         # rescaled top_layer_thickness so that total_depth == target_depth