diff --git a/include/spdlog/details/async_log_helper.h b/include/spdlog/details/async_log_helper.h
index f82371b2..07ff5c6b 100644
--- a/include/spdlog/details/async_log_helper.h
+++ b/include/spdlog/details/async_log_helper.h
@@ -125,9 +125,9 @@ private:
 
     // last exception thrown from the worker thread
     std::shared_ptr<spdlog_ex> _last_workerthread_ex;
-	
-	// overflow policy
-	const async_queue_overflow_policy _overflow_policy;
+
+    // overflow policy
+    const async_queue_overflow_policy _overflow_policy;
 
     // worker thread warmup callback - one can set thread priority, affinity, etc
     const std::function<void()> _worker_warmup_cb;
@@ -157,7 +157,7 @@ inline spdlog::details::async_log_helper::async_log_helper(formatter_ptr formatt
     _formatter(formatter),
     _sinks(sinks),
     _q(queue_size),
-	_overflow_policy(overflow_policy),
+    _overflow_policy(overflow_policy),
     _worker_warmup_cb(worker_warmup_cb),
     _worker_thread(&async_log_helper::worker_loop, this)
 {}
diff --git a/include/spdlog/details/registry.h b/include/spdlog/details/registry.h
index 0ac60dd0..d85b5bf5 100644
--- a/include/spdlog/details/registry.h
+++ b/include/spdlog/details/registry.h
@@ -125,8 +125,8 @@ public:
         std::lock_guard<std::mutex> lock(_mutex);
         _async_mode = true;
         _async_q_size = q_size;
-		_overflow_policy = overflow_policy;
-		_worker_warmup_cb = worker_warmup_cb;
+        _overflow_policy = overflow_policy;
+        _worker_warmup_cb = worker_warmup_cb;
     }
 
     void set_sync_mode()
@@ -152,8 +152,8 @@ private:
     level::level_enum _level = level::info;
     bool _async_mode = false;
     size_t _async_q_size = 0;
-	async_queue_overflow_policy _overflow_policy = async_queue_overflow_policy::block_retry;
-	std::function<void()> _worker_warmup_cb = nullptr;
+    async_queue_overflow_policy _overflow_policy = async_queue_overflow_policy::block_retry;
+    std::function<void()> _worker_warmup_cb = nullptr;
 };
 }
 }
diff --git a/include/spdlog/spdlog.h b/include/spdlog/spdlog.h
index b6df62a2..27673310 100644
--- a/include/spdlog/spdlog.h
+++ b/include/spdlog/spdlog.h
@@ -61,9 +61,10 @@ void set_level(level::level_enum log_level);
 // Async mode - off by default.
 //
 
-enum class async_queue_overflow_policy {
-	block_retry, // Block / yield / sleep until message can be enqueued
-	discard_log_msg // Discard the message it enqueue fails
+enum class async_queue_overflow_policy
+{
+    block_retry, // Block / yield / sleep until message can be enqueued
+    discard_log_msg // Discard the message it enqueue fails
 };
 
 // Turn on async mode and set the queue size for each async_logger