diff --git a/libretroshare/src/serialiser/rstypeserializer.cc b/libretroshare/src/serialiser/rstypeserializer.cc
index 054db45a4..33c3a90e9 100644
--- a/libretroshare/src/serialiser/rstypeserializer.cc
+++ b/libretroshare/src/serialiser/rstypeserializer.cc
@@ -193,7 +193,7 @@ template<> void RsTypeSerializer::print_data(const std::string& n, uint16_t type
 //                                       TlvInt with subtype                                       //
 //=================================================================================================//
 
-template<> uint32_t RsTypeSerializer::serial_size(uint16_t /* type_subtype */,const uint32_t& s)
+template<> uint32_t RsTypeSerializer::serial_size(uint16_t /* type_subtype */,const uint32_t& /*s*/)
 {
 	return GetTlvUInt32Size() ;
 }