diff --git a/mediator/med_io_mod.F90 b/mediator/med_io_mod.F90
index 69d1891f..97db9bcc 100644
--- a/mediator/med_io_mod.F90
+++ b/mediator/med_io_mod.F90
@@ -1140,7 +1140,6 @@ subroutine med_io_write_FB(filename, FB, whead, wdata, nx, ny, nt, &
        call pio_syncfile(io_file(lfile_ind))
        call pio_freedecomp(io_file(lfile_ind), iodesc)
     endif
-    deallocate(fieldNameList)
     deallocate(ownedElemCoords, ownedElemCoords_x, ownedElemCoords_y)
 
     if (dbug_flag > 5) then