diff --git a/src/MNH/dust_filter.f90 b/src/MNH/dust_filter.f90
index 71176c1e04bf52a55ba3e209defbb50fb6315fab..e0eb6d27abcbcf0eee307daaa67e055ddd122a21 100644
--- a/src/MNH/dust_filter.f90
+++ b/src/MNH/dust_filter.f90
@@ -163,7 +163,6 @@ DO JN=1,NMODE_DST
      ZM(:,:,:,NM6(JN)) = ZM(:,:,:,NM0(JN)) * (ZINIRADIUS(JN)**6) * &
                EXP(18 *(LOG(ZINISIGMA(JN)))**2)
 
-     IF (LVARSIG) THEN
      WHERE ((ZM(:,:,:,NM0(JN)) .LT. ZMMIN(NM0(JN))).OR.&
             (ZM(:,:,:,NM3(JN)) .LT. ZMMIN(NM3(JN))).OR.&
             (ZM(:,:,:,NM6(JN)) .LT. ZMMIN(NM6(JN))))
@@ -172,15 +171,6 @@ DO JN=1,NMODE_DST
      ZM(:,:,:,NM6(JN)) = ZMMIN(NM6(JN))
      END WHERE
 
-     ELSE IF (.NOT.(LRGFIX_DST)) THEN
-
-     WHERE ((ZM(:,:,:,NM0(JN)) .LT. ZMMIN(NM0(JN))).OR.&
-            (ZM(:,:,:,NM3(JN)) .LT. ZMMIN(NM3(JN))))
-     ZM(:,:,:,NM0(JN)) = ZMMIN(NM0(JN))
-     ZM(:,:,:,NM3(JN)) = ZMMIN(NM3(JN))
-     END WHERE
-     ENDIF
-
     ! return to concentration #/m3 =>  (#/molec_{air}
      IF (LVARSIG) THEN
      PSV(:,:,:,1+(JN-1)*3) = ZM(:,:,:,NM0(JN)) * XMD / &
diff --git a/src/MNH/mode_dust_psd.f90 b/src/MNH/mode_dust_psd.f90
index 016abf4f5c41b1bdd3d86c030a9dfecfbdda06df..4c41122319591ef0eb5ae60361118a8d771c6747 100644
--- a/src/MNH/mode_dust_psd.f90
+++ b/src/MNH/mode_dust_psd.f90
@@ -260,15 +260,15 @@ DO JN=1,NMODE_DST
          * PRHODREF(:,:,:)                       !==>#/m3
 
     ! Limit concentration to minimum values
-!    WHERE ((ZM(:,:,:,NM0(JN)) < ZMMIN(NM0(JN)) ).OR. &
-!           (ZM(:,:,:,NM3(JN)) < ZMMIN(NM3(JN)) )) 
-!       ZM(:,:,:,NM0(JN)) = ZMMIN(NM0(JN))
-!       ZM(:,:,:,NM3(JN)) = ZMMIN(NM3(JN))
-!       PSVT(:,:,:,1+(JN-1)*2) = ZM(:,:,:,NM0(JN)) * XMD / &
-!       (XAVOGADRO * PRHODREF(:,:,:) )
-!       PSVT(:,:,:,2+(JN-1)*2) = ZM(:,:,:,NM3(JN)) * XMD * XPI * 4./3. * ZRHOI  / &
-!                              (ZMI*PRHODREF(:,:,:)*XM3TOUM3)
-!    ENDWHERE
+    WHERE ((ZM(:,:,:,NM0(JN)) < ZMMIN(NM0(JN)) ).OR. &
+           (ZM(:,:,:,NM3(JN)) < ZMMIN(NM3(JN)) )) 
+       ZM(:,:,:,NM0(JN)) = ZMMIN(NM0(JN))
+       ZM(:,:,:,NM3(JN)) = ZMMIN(NM3(JN))
+       PSVT(:,:,:,1+(JN-1)*2) = ZM(:,:,:,NM0(JN)) * XMD / &
+       (XAVOGADRO * PRHODREF(:,:,:) )
+       PSVT(:,:,:,2+(JN-1)*2) = ZM(:,:,:,NM3(JN)) * XMD * XPI * 4./3. * ZRHOI  / &
+                              (ZMI*PRHODREF(:,:,:)*XM3TOUM3)
+    ENDWHERE
     END IF
 
     !