diff --git a/src/glog/logging.h.in b/src/glog/logging.h.in
index 812fc92af..0281f6de5 100644
--- a/src/glog/logging.h.in
+++ b/src/glog/logging.h.in
@@ -1741,7 +1741,7 @@ class GLOG_EXPORT Logger {
   // Get the current LOG file size.
   // The returned value is approximate since some
   // logged data may not have been flushed to disk yet.
-  virtual uint32 LogSize() = 0;
+  virtual std::size_t LogSize() = 0;
 };
 
 // Get the logger for the specified severity level.  The logger
diff --git a/src/logging.cc b/src/logging.cc
index fa8868561..b39217ae8 100644
--- a/src/logging.cc
+++ b/src/logging.cc
@@ -453,7 +453,7 @@ class LogFileObject : public base::Logger {
 
   // It is the actual file length for the system loggers,
   // i.e., INFO, ERROR, etc.
-  uint32 LogSize() override {
+  std::size_t LogSize() override {
     MutexLock l(&lock_);
     return file_length_;
   }
@@ -475,7 +475,7 @@ class LogFileObject : public base::Logger {
   LogSeverity severity_;
   uint32 bytes_since_flush_{0};
   uint32 dropped_mem_length_{0};
-  uint32 file_length_{0};
+  std::size_t file_length_{0};
   unsigned int rollover_attempt_;
   int64 next_flush_time_{0};  // cycle count at which to flush log
   WallTime start_time_;
diff --git a/src/logging_unittest.cc b/src/logging_unittest.cc
index fff766070..b452c6637 100644
--- a/src/logging_unittest.cc
+++ b/src/logging_unittest.cc
@@ -894,7 +894,7 @@ struct MyLogger : public base::Logger {
 
   void Flush() override {}
 
-  uint32 LogSize() override { return data.length(); }
+  std::size_t LogSize() override { return data.length(); }
 
  private:
   bool* set_on_destruction_;
@@ -1027,7 +1027,7 @@ struct RecordDeletionLogger : public base::Logger {
     wrapped_logger_->Write(force_flush, timestamp, message, length);
   }
   void Flush() override { wrapped_logger_->Flush(); }
-  uint32 LogSize() override { return wrapped_logger_->LogSize(); }
+  std::size_t LogSize() override { return wrapped_logger_->LogSize(); }
 
  private:
   bool* set_on_destruction_;