diff --git a/src/tracer/MOM_tracer_registry.F90 b/src/tracer/MOM_tracer_registry.F90
index ef0adf9479..b56e10afc9 100644
--- a/src/tracer/MOM_tracer_registry.F90
+++ b/src/tracer/MOM_tracer_registry.F90
@@ -447,6 +447,9 @@ subroutine register_tracer_diagnostics(Reg, h, Time, diag, G, GV, US, use_ALE, u
     if (Tr%id_hbd_dfx_2d > 0) call safe_alloc_ptr(Tr%hbd_dfx_2d,IsdB,IedB,jsd,jed)
     if (Tr%id_hbd_dfy_2d > 0) call safe_alloc_ptr(Tr%hbd_dfy_2d,isd,ied,JsdB,JedB)
 
+    ! The following diagnostics for generic tracer budgets were
+    ! originally developed by Enhui Lao, Fan Yang, and Mathieu Poupon.
+
     Tr%id_adv_xy = register_diag_field('ocean_model', trim(shortnm)//"_advection_xy", &
         diag%axesTL, Time, &
         'Horizontal convergence of residual mean advective fluxes of '//&