diff --git a/src/lib/base/EventQueue.cpp b/src/lib/base/EventQueue.cpp
index b12c0736..8327a4af 100644
--- a/src/lib/base/EventQueue.cpp
+++ b/src/lib/base/EventQueue.cpp
@@ -112,7 +112,7 @@ CEventQueue::loop()
 	LOG((CLOG_DEBUG "event queue is ready"));
 	while (!m_pending.empty()) {
 		LOG((CLOG_DEBUG "add pending events to buffer"));
-		CEvent& event = m_pending.front();
+		const CEvent& event = m_pending.front();
 		addEventToBuffer(event);
 		m_pending.pop();
 	}