diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d0ea6c9c1a..5855aeb39b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -354,7 +354,6 @@ list(
   mao_basis.F
   mao_methods.F
   mao_optimizer.F
-  mao_types.F
   mao_wfn_analysis.F
   matrix_exp.F
   maxwell_solver_interface.F
diff --git a/src/mao_types.F b/src/mao_types.F
deleted file mode 100644
index dff2e4c055..0000000000
--- a/src/mao_types.F
+++ /dev/null
@@ -1,64 +0,0 @@
-!--------------------------------------------------------------------------------------------------!
-!   CP2K: A general program to perform molecular dynamics simulations                              !
-!   Copyright 2000-2025 CP2K developers group <https://cp2k.org>                                   !
-!                                                                                                  !
-!   SPDX-License-Identifier: GPL-2.0-or-later                                                      !
-!--------------------------------------------------------------------------------------------------!
-
-! **************************************************************************************************
-!> \brief The types needed for the calculation of modified atomic orbitals (MAO)
-!> \par History
-!>      03.2016 created [JGH]
-!> \author JGH
-! **************************************************************************************************
-MODULE mao_types
-
-#include "./base/base_uses.f90"
-   IMPLICIT NONE
-   PRIVATE
-
-   CHARACTER(len=*), PARAMETER, PRIVATE :: moduleN = 'mao_types'
-
-! **************************************************************************************************
-!> \brief Quantities needed for MAO's
-!> \author JGH
-! **************************************************************************************************
-   TYPE mao_type
-      INTEGER                       :: ref_basis = -1
-   END TYPE mao_type
-
-! **************************************************************************************************
-
-CONTAINS
-
-! **************************************************************************************************
-!> \brief ...
-!> \param mao_env ...
-! **************************************************************************************************
-   SUBROUTINE create_mao_type(mao_env)
-      TYPE(mao_type), POINTER                            :: mao_env
-
-      IF (ASSOCIATED(mao_env)) THEN
-         CALL release_mao_type(mao_env)
-      END IF
-
-      ALLOCATE (mao_env)
-
-   END SUBROUTINE create_mao_type
-
-! **************************************************************************************************
-!> \brief ...
-!> \param mao_env ...
-! **************************************************************************************************
-   SUBROUTINE release_mao_type(mao_env)
-      TYPE(mao_type), POINTER                            :: mao_env
-
-      IF (ASSOCIATED(mao_env)) THEN
-         DEALLOCATE (mao_env)
-      END IF
-
-   END SUBROUTINE release_mao_type
-
-! **************************************************************************************************
-
-END MODULE mao_types