diff --git a/src/include/cppduals/duals/dual b/src/include/cppduals/duals/dual
index 4cb227e84..1e46b4c23 100644
--- a/src/include/cppduals/duals/dual
+++ b/src/include/cppduals/duals/dual
@@ -485,9 +485,6 @@ struct is_arithmetic<duals::dual<T>> : is_arithmetic<T> {};
 
 #endif // CPPDUALS_ENABLE_IS_ARITHMETIC
 
-/// Duals are compound types.
-template <class T>
-struct is_compound<duals::dual<T>> : true_type {};
 
 // Modification of std::numeric_limits<> per
 // C++03 17.4.3.1/1, and C++11 18.3.2.3/1.