diff --git a/src/core/MOM_continuity.F90 b/src/core/MOM_continuity.F90
index 206333401f..a598d01160 100644
--- a/src/core/MOM_continuity.F90
+++ b/src/core/MOM_continuity.F90
@@ -73,6 +73,8 @@ module MOM_continuity
   !>@}
 end type cont_loop_bounds_type
 
+!> Finds the thickness fluxes from the continuity solver or their vertical sum without
+!! actually updating the layer thicknesses.
 interface continuity_fluxes
   module procedure continuity_3d_fluxes, continuity_2d_fluxes
 end interface continuity_fluxes