1 files changed, 7 insertions, 4 deletions
diff --git a/src/server/PreProcessor.hpp b/src/server/PreProcessor.hpp
index 9ee20255..8d15c0a6 100644
--- a/src/server/PreProcessor.hpp
+++ b/src/server/PreProcessor.hpp
@@ -17,17 +17,20 @@
 #ifndef INGEN_ENGINE_PREPROCESSOR_HPP
 #define INGEN_ENGINE_PREPROCESSOR_HPP
 
-#include <atomic>
-#include <thread>
-#include <mutex>
+#include "Event.hpp"
 
 #include "raul/Semaphore.hpp"
 
+#include <atomic>
+#include <chrono>
+#include <cstddef>
+#include <mutex>
+#include <thread>
+
 namespace ingen {
 namespace server {
 
 class Engine;
-class Event;
 class PostProcessor;
 class RunContext;