diff --git a/src/finish.cpp b/src/finish.cpp
index dd0dcf971e..1237775e97 100644
--- a/src/finish.cpp
+++ b/src/finish.cpp
@@ -393,6 +393,8 @@ void Finish::end(int flag)
       fprintf(logfile,"Dangerous builds = %d\n",neighbor->ndanger);
     }
   }
+
+  if (logfile) fflush(logfile);
 }
 
 /* ---------------------------------------------------------------------- */