diff --git a/include/spdlog/sinks/rotating_file_sink-inl.h b/include/spdlog/sinks/rotating_file_sink-inl.h
index 9f9aa47a..420bafb0 100644
--- a/include/spdlog/sinks/rotating_file_sink-inl.h
+++ b/include/spdlog/sinks/rotating_file_sink-inl.h
@@ -71,6 +71,7 @@ SPDLOG_INLINE filename_t rotating_file_sink<Mutex>::filename() {
 
 template <typename Mutex>
 SPDLOG_INLINE void rotating_file_sink<Mutex>::rotate_now() {
+    std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
     rotate_();
 }