diff --git a/src/core/math/Vector3.h b/src/core/math/Vector3.h
index 413cf0d69e793a7e7bddb2284324f13c75276643..fef637a2e9e7e0b87243ea4394959a48366ddc42 100644
--- a/src/core/math/Vector3.h
+++ b/src/core/math/Vector3.h
@@ -1969,7 +1969,7 @@ namespace std
     {
         std::size_t operator()( walberla::Vector3<T> const & v ) const noexcept
         {
-            return walberla::Vector3<T>::hash_value( v );
+            return walberla::math::hash_value( v );
         }
     };
 } // namespace std