Index: /trunk/LMDZ.TITAN/libf/phytitan/physiq_mod.F90
===================================================================
--- /trunk/LMDZ.TITAN/libf/phytitan/physiq_mod.F90	(revision 1900)
+++ /trunk/LMDZ.TITAN/libf/phytitan/physiq_mod.F90	(revision 1901)
@@ -1146,5 +1146,5 @@
                   call calmufi(zplevbar,zzlevbar,zplaybar,zzlaybar,ztfibar,tpq,zdqmufi)
                endif
-               tpq(:,:,:) = tpq(:,:,:) + zdqmufi(1:ngrid,1:nlayer,1:nq)*ptimestep
+               tpq(:,:,:) = tpq(:,:,:) + zdqmufi(1:ngrid,1:nlayer,1:nq)
 #else
             ! Inside this routine we will split 2D->1D, intensive->extensive and separate different types of tracers
@@ -1157,5 +1157,7 @@
                endif
 
-            pdq(1:ngrid,1:nlayer,1:nq) = pdq(1:ngrid,1:nlayer,1:nq) + zdqmufi(1:ngrid,1:nlayer,1:nq)   
+            pdq(1:ngrid,1:nlayer,1:nq) = pdq(1:ngrid,1:nlayer,1:nq) + zdqmufi(1:ngrid,1:nlayer,1:nq)
+            ! We don't re-multiply by timestep, it is already taken into account in zdqmufi,
+            ! since inimufi has initialized YAMMS with a given ts.
 #endif
          endif ! end of 'callmufi'