diff --git a/gfsphysics/physics/samfdeepcnv.f b/gfsphysics/physics/samfdeepcnv.f
index 76204ebb4..d29410d2f 100644
--- a/gfsphysics/physics/samfdeepcnv.f
+++ b/gfsphysics/physics/samfdeepcnv.f
@@ -1547,22 +1547,22 @@ subroutine samfdeepcnv(im,ix,km,delt,itc,ntc,ntk,ntr,delp,
       enddo
       enddo
       do i = 1, im
-        betamn = betas
-        if(islimsk(i) == 1) betamn = betal
-        if(ntk > 0) then
-          betamx = betamn + dbeta
-          if(tkemean(i) > tkemx) then
-            beta = betamn
-          else if(tkemean(i) < tkemn) then
-            beta = betamx
+        if(cnvflg(i)) then
+          betamn = betas
+          if(islimsk(i) == 1) betamn = betal
+          if(ntk > 0) then
+            betamx = betamn + dbeta
+            if(tkemean(i) > tkemx) then
+              beta = betamn
+            else if(tkemean(i) < tkemn) then
+              beta = betamx
+            else
+              tem = (betamx - betamn) * (tkemean(i) - tkemn)
+              beta = betamx - tem  / dtke
+            endif
           else
-            tem = (betamx - betamn) * (tkemean(i) - tkemn)
-            beta = betamx - tem  / dtke
+            beta = betamn
           endif
-        else
-          beta = betamn
-        endif
-        if(cnvflg(i)) then
           dz  = (sumx(i)+zi(i,1))/float(kbcon(i))
           tem = 1./float(kbcon(i))
           xlamd(i) = (1.-beta**tem)/dz