diff --git a/src/AFQMC/Hamiltonians/Hamiltonian.hpp b/src/AFQMC/Hamiltonians/Hamiltonian.hpp
index e1f5f6c63f..e1ea227817 100644
--- a/src/AFQMC/Hamiltonians/Hamiltonian.hpp
+++ b/src/AFQMC/Hamiltonians/Hamiltonian.hpp
@@ -70,7 +70,7 @@ class dummy_Hamiltonian
   boost::multi::array<SPComplexType, 1> halfRotatedHij(WALKER_TYPES type, PsiT_Matrix* Alpha, PsiT_Matrix* Beta)
   {
     throw std::runtime_error("calling visitor on dummy object");
-    return boost::multi::array<ComplexType, 1>(iextensions<1u>{1});
+    return boost::multi::array<SPComplexType, 1>(iextensions<1u>{1});
   }
 
   SpCType_shm_csr_matrix halfRotatedHijkl(WALKER_TYPES type,