diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index 9e2d239abd..b59f42c4b8 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -839,6 +839,10 @@ static bool shall_try_append_again(JournalFile *f, int r) {
                 log_ratelimit_warning(JOURNAL_LOG_RATELIMIT, "%s: Journal file is from the future, rotating.", f->path);
                 return true;
 
+        case -EREMCHG:         /* Time jumped backwards relative to last journal entry */
+                log_ratelimit_warning(JOURNAL_LOG_RATELIMIT, "%s: Time jumped backwards relative to last journal entry, rotating.", f->path);
+                return true;
+
         case -EAFNOSUPPORT:
                 log_ratelimit_warning(JOURNAL_LOG_RATELIMIT,
                                       "%s: underlying file system does not support memory mapping or another required file system feature.",
diff --git a/src/libsystemd/sd-journal/journal-file.c b/src/libsystemd/sd-journal/journal-file.c
index ab518fea80..805773474c 100644
--- a/src/libsystemd/sd-journal/journal-file.c
+++ b/src/libsystemd/sd-journal/journal-file.c
@@ -2092,6 +2092,12 @@ static int journal_file_append_entry_internal(
         assert(ts);
         assert(items || n_items == 0);
 
+        if (ts->realtime < le64toh(f->header->tail_entry_realtime))
+                return log_debug_errno(SYNTHETIC_ERRNO(EREMCHG),
+                                       "Realtime timestamp %" PRIu64 " smaller than previous realtime "
+                                       "timestamp %" PRIu64 ", refusing entry.",
+                                       ts->realtime, le64toh(f->header->tail_entry_realtime));
+
         osize = offsetof(Object, entry.items) + (n_items * journal_file_entry_item_size(f));
 
         r = journal_file_append_object(f, OBJECT_ENTRY, osize, &o, &np);