--- acct/file_rd.c
+++ acct/file_rd.c
@@ -118,6 +118,10 @@ char *file_reader_get_entry(struct file_rd_info *fri)
                               ? max_recs
                               : fri->buffered_records);
 
+              /* Prevent UB when incomplete record appears */
+              if (recs_to_read==0)
+                goto no_more_records;
+
               /* Move back in the file */
 
               (void)fseek(fri->fp, -fri->record_size * recs_to_read,