diff --git a/util/FileCreator.cpp b/util/FileCreator.cpp
index 7b062d65..431a6912 100644
--- a/util/FileCreator.cpp
+++ b/util/FileCreator.cpp
@@ -190,7 +190,7 @@ int FileCreator::openExistingFile(ThreadCtx &threadCtx,
   int res;
   {
     PerfStatCollector statCollector(threadCtx, PerfStatReport::FILE_OPEN);
-    res = open(path.c_str(), openFlags, 0644);
+    res = open(path.c_str(), openFlags, 0666);
   }
   if (res < 0) {
     WPLOG(ERROR) << "failed opening file " << path;
@@ -263,7 +263,7 @@ int FileCreator::createFile(ThreadCtx &threadCtx, const string &relPathStr) {
   int res;
   {
     PerfStatCollector statCollector(threadCtx, PerfStatReport::FILE_OPEN);
-    res = open(path.c_str(), openFlags, 0644);
+    res = open(path.c_str(), openFlags, 0666);
   }
   if (res < 0) {
     if (dir.empty()) {
@@ -284,7 +284,7 @@ int FileCreator::createFile(ThreadCtx &threadCtx, const string &relPathStr) {
     }
     {
       PerfStatCollector statCollector(threadCtx, PerfStatReport::FILE_OPEN);
-      res = open(path.c_str(), openFlags, 0644);
+      res = open(path.c_str(), openFlags, 0666);
     }
     if (res < 0) {
       WPLOG(ERROR) << "failed creating file " << path;
diff --git a/util/TransferLogManager.cpp b/util/TransferLogManager.cpp
index 11ac935a..40f2e96b 100644
--- a/util/TransferLogManager.cpp
+++ b/util/TransferLogManager.cpp
@@ -255,7 +255,7 @@ ErrorCode TransferLogManager::openLog() {
     } else {
       // creation of the log path (which can still be a race)
       WLOG(INFO) << logPath << " doesn't exist... creating...";
-      fd_ = ::open(logPath.c_str(), O_CREAT | O_EXCL, 0644);
+      fd_ = ::open(logPath.c_str(), O_CREAT | O_EXCL, 0666);
       if (fd_ < 0) {
         WPLOG(WARNING) << "Could not create wdt log (maybe ok if race): "
                        << logPath;