diff --git a/src/mesh/RefId.hpp b/src/mesh/RefId.hpp
index 325fc25a5d6525608fb625046f850297dba05fa6..dbd4f1a1b113b885b1040fdb3a0372f881e56a0c 100644
--- a/src/mesh/RefId.hpp
+++ b/src/mesh/RefId.hpp
@@ -38,7 +38,7 @@ class RefId
              (m_tag_name<ref_id.m_tag_name)));
   }
 
-  const TagNumberType tagNumber() const
+  TagNumberType tagNumber() const
   {
     return m_tag_number;
   }