diff --git a/config.c b/config.c
index e9992e3..926d388 100644
--- a/config.c
+++ b/config.c
@@ -1488,7 +1488,8 @@ static int readConfigFile(const char *configFile, struct logInfo *defConfig)
}
- if (sb.st_dev != sb2.st_dev) {
+ if (sb.st_dev != sb2.st_dev
+ && !(newlog->flags & (LOG_FLAG_COPYTRUNCATE | LOG_FLAG_COPY))) {
message(MESS_ERROR,
"%s:%d olddir %s and log file %s "
"are on different devices\n", configFile,