diff --git a/asteria/runtime/binding_generator.hpp b/asteria/runtime/binding_generator.hpp
index 76f75eb01..b75d5282b 100644
--- a/asteria/runtime/binding_generator.hpp
+++ b/asteria/runtime/binding_generator.hpp
@@ -4,7 +4,7 @@
 #ifndef ASTERIA_RUNTIME_BINDING_GENERATOR_
 #define ASTERIA_RUNTIME_BINDING_GENERATOR_
 
-#include "fwd.hpp"
+#include "../fwd.hpp"
 namespace asteria {
 
 class Binding_Generator