diff --git a/src/output.cpp b/src/output.cpp
index a8fda4173d..b2b8011842 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -619,9 +619,8 @@ int Output::check_time_dumps(bigint ntimestep)
  {
    next_dump_any = MAXBIGINT;
    for (int idump = 0; idump < ndump; idump++)
-     if (last_dump[idump] >= 0)
-       error->all(FLERR,
-                  "Cannot reset timestep with active dump - must undump first");
+     if ((last_dump[idump] >= 0) && !update->whichflag)
+       error->all(FLERR, "Cannot reset timestep with active dump - must undump first");
 
    if (restart_flag_single) {
      if (restart_every_single) {