diff --git a/include/valijson/adapters/std_string_adapter.hpp b/include/valijson/adapters/std_string_adapter.hpp
index a7b5fca..99d09ab 100644
--- a/include/valijson/adapters/std_string_adapter.hpp
+++ b/include/valijson/adapters/std_string_adapter.hpp
@@ -18,6 +18,7 @@
 
 #include <valijson/adapters/adapter.hpp>
 #include <valijson/adapters/frozen_value.hpp>
+#include <valijson/adapters/basic_adapter.hpp>
 
 namespace valijson {
 namespace adapters {