diff --git a/arangod/Aql/Index.cpp b/arangod/Aql/Index.cpp
index b430d4f353..cc0ccd54a3 100644
--- a/arangod/Aql/Index.cpp
+++ b/arangod/Aql/Index.cpp
@@ -26,9 +26,11 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Index.h"
+#include "Aql/Ast.h"
 #include "Aql/AstNode.h"
 #include "Aql/SortCondition.h"
 #include "Aql/Variable.h"
+#include "Indexes/Index.h"
 
 using namespace std;
 using namespace triagens::basics;