diff --git a/server_http.hpp b/server_http.hpp
index 83e2739..e5fae19 100644
--- a/server_http.hpp
+++ b/server_http.hpp
@@ -21,6 +21,7 @@
 #endif
 
 // TODO when switching to c++14, use [[deprecated]] instead
+#ifndef DEPRECATED
 #ifdef __GNUC__
 #define DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
@@ -28,6 +29,7 @@
 #else
 #define DEPRECATED
 #endif
+#endif
 
 namespace SimpleWeb {
     template <class socket_type>