diff --git a/src/ast/special_relations_decl_plugin.h b/src/ast/special_relations_decl_plugin.h
index 068382b23..ef432dbcc 100644
--- a/src/ast/special_relations_decl_plugin.h
+++ b/src/ast/special_relations_decl_plugin.h
@@ -20,8 +20,7 @@ Revision History:
 #ifndef SPECIAL_RELATIONS_DECL_PLUGIN_H_
 #define SPECIAL_RELATIONS_DECL_PLUGIN_H_
 
-#include"ast.h"
-
+#include "ast/ast.h"
 
 
 enum special_relations_op_kind {