diff --git a/icebergs_io.F90 b/icebergs_io.F90
index bac10b4..2c00b21 100644
--- a/icebergs_io.F90
+++ b/icebergs_io.F90
@@ -128,6 +128,9 @@ subroutine write_restart(bergs)
                                       jne,       &
                                       start_year
 
+  ! Get the stderr unit number
+  stderrunit=stderr()
+
 
   ! For convenience
   grd=>bergs%grd