diff --git a/org/qmckl_mo.org b/org/qmckl_mo.org
index 71af13c..85f0607 100644
--- a/org/qmckl_mo.org
+++ b/org/qmckl_mo.org
@@ -2255,6 +2255,7 @@ qmckl_compute_mo_basis_mo_vgl_hpc_sp (const qmckl_context context,
     free(av4);
     free(av5);
   }
+  free(coefficient_t_sp);
   return QMCKL_SUCCESS;
 }
 #endif