diff --git a/include/sqlpp11/data_types/blob/data_type.h b/include/sqlpp11/data_types/blob/data_type.h
index c0137507..2758a761 100644
--- a/include/sqlpp11/data_types/blob/data_type.h
+++ b/include/sqlpp11/data_types/blob/data_type.h
@@ -28,6 +28,7 @@
 #define SQLPP_BLOB_DATA_TYPE_H
 
 #include <vector>
+#include <cstdint>
 
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/logic.h>
diff --git a/include/sqlpp11/detail/type_set.h b/include/sqlpp11/detail/type_set.h
index f5788354..20672678 100644
--- a/include/sqlpp11/detail/type_set.h
+++ b/include/sqlpp11/detail/type_set.h
@@ -60,7 +60,7 @@ namespace sqlpp
       };
 
     public:
-      using size = std::integral_constant<size_t, sizeof...(Elements)>;
+      using size = std::integral_constant<std::size_t, sizeof...(Elements)>;
       using _is_type_set = std::true_type;
 
       template <typename T>