diff --git a/regtests/ww3_tp2.10/input/ww3_grid.nml b/regtests/ww3_tp2.10/input/ww3_grid.nml
index ee9ac10e4..26e0465dc 100644
--- a/regtests/ww3_tp2.10/input/ww3_grid.nml
+++ b/regtests/ww3_tp2.10/input/ww3_grid.nml
@@ -67,6 +67,13 @@
   SMC%SUBTR%FILENAME        =  '../input/ErieObstr.dat'
 /
 
+! -------------------------------------------------------------------- !
+! Scaling factor for depth input file
+! -------------------------------------------------------------------- !
+&DEPTH_NML
+  DEPTH%SF = -1.0
+/
+
 ! -------------------------------------------------------------------- !
 ! WAVEWATCH III - end of namelist                                      !
 ! -------------------------------------------------------------------- !
diff --git a/regtests/ww3_tp2.16/input/ww3_grid.nml b/regtests/ww3_tp2.16/input/ww3_grid.nml
index 19b0fdc05..c97e3126d 100644
--- a/regtests/ww3_tp2.16/input/ww3_grid.nml
+++ b/regtests/ww3_tp2.16/input/ww3_grid.nml
@@ -70,6 +70,13 @@
   SMC%AJSID%FILENAME        =  '../input/A50AJSide.dat'
 /
 
+! -------------------------------------------------------------------- !
+! Scaling factor for depth input file
+! -------------------------------------------------------------------- !
+&DEPTH_NML
+  DEPTH%SF = -1.0
+/
+
 ! -------------------------------------------------------------------- !
 ! WAVEWATCH III - end of namelist                                      !
 ! -------------------------------------------------------------------- !