diff --git a/src/dftd3/param.f90 b/src/dftd3/param.f90
index 3f6afa41..cfa4ef51 100644
--- a/src/dftd3/param.f90
+++ b/src/dftd3/param.f90
@@ -25,6 +25,7 @@ module dftd3_param
       & doi_r2scan_hyb, doi_r2scan_dhdf, doi_minnesota_d3, doi_b97m_d3, &
       & doi_wb97x_d3, doi_hse06_d3, doi_cf22d, doi_skala
    implicit none
+   private
 
    public :: d3_param
    public :: get_rational_damping, get_zero_damping
diff --git a/test/export/example.f90 b/test/export/example.f90
index cb256ed3..68be5747 100644
--- a/test/export/example.f90
+++ b/test/export/example.f90
@@ -1,4 +1,7 @@
 program tester
-  use dftd3
+  use dftd3_version, only : get_dftd3_version
   implicit none
+  character(len=:), allocatable :: version
+  call get_dftd3_version(string=version)
+  print *, version
 end program tester