diff --git a/src/HTMLRenderer/StateTracker.h b/src/HTMLRenderer/StateTracker.h
index 35a38d8..7dfe6fd 100644
--- a/src/HTMLRenderer/StateTracker.h
+++ b/src/HTMLRenderer/StateTracker.h
@@ -10,6 +10,7 @@
#ifndef STATETRACKER_H__
#define STATETRACKER_H__
+#include
#include