diff --git a/src/MemoryX.h b/src/MemoryX.h
index 56e99171a9eb87fe574291d0ec9d086efb0c1fbb..621afa3001ba354f36e80edb86c72a45dca426cb 100644
--- a/src/MemoryX.h
+++ b/src/MemoryX.h
@@ -1171,7 +1173,7 @@ namespace std
    namespace tr1
    {
 #endif
-      template<typename T> struct hash;
+
       template<> struct hash< wxString > {
          size_t operator () (const wxString &str) const // noexcept
          {