diff --git a/include/Spectre/System/MessageQueue.h b/include/Spectre/System/MessageQueue.h
index 4f5e854..e1fcb34 100644
--- a/include/Spectre/System/MessageQueue.h
+++ b/include/Spectre/System/MessageQueue.h
@@ -10,7 +10,7 @@ namespace sp {
 class MessageQueue
 {
 public :
-	void postEvent(SysEvent& event);
+	void postEvent(SysEvent event);
 
 	bool pollEvent(SysEvent& event);
 
diff --git a/source/System/MessageQueue.cpp b/source/System/MessageQueue.cpp
index fa547d3..4054c1e 100644
--- a/source/System/MessageQueue.cpp
+++ b/source/System/MessageQueue.cpp
@@ -3,7 +3,7 @@
 
 namespace sp {
 
-void MessageQueue::postEvent(SysEvent& event)
+void MessageQueue::postEvent(SysEvent event)
 {
 	m_queue.push_back(event);
 }
@@ -23,4 +23,4 @@ bool MessageQueue::isEmpty() const
 	return m_queue.empty();
 }
 
-} // namespace sp
\ No newline at end of file
+} // namespace sp