diff --git a/physics/MP/NSSL/module_mp_nssl_2mom.F90 b/physics/MP/NSSL/module_mp_nssl_2mom.F90
index 1afbc13cf..130f9bf9a 100644
--- a/physics/MP/NSSL/module_mp_nssl_2mom.F90
+++ b/physics/MP/NSSL/module_mp_nssl_2mom.F90
@@ -10052,6 +10052,8 @@ SUBROUTINE NUCOND    &
 
           IF ( c1 > 0. ) THEN
             ssfilt(ix,jy,kz) = 100.*(an(ix,jy,kz,lv)/c1 - 1.0)  ! from "new" values
+          ELSE
+            ssfilt(ix,jy,kz) = -100.
           ENDIF
 
         ENDDO