diff --git a/src/templates_front/build.sh b/src/templates_front/build.sh
index 4d0dadc..eea06a5 100644
--- a/src/templates_front/build.sh
+++ b/src/templates_front/build.sh
@@ -25,9 +25,9 @@ cat prefix_python.py   > trexio.py
 # append version string and attributes to the Fortran module file
 echo "" >> trexio_f.f90
 echo "character(len = 12) :: TREXIO_PACKAGE_VERSION = ${VERSION_VAL}" >> trexio_f.f90
-echo "integer(c_int32_t) :: TREXIO_VERSION_MAJOR = ${VERSION_MAJOR_VAL}" >> trexio_f.f90
-echo "integer(c_int32_t) :: TREXIO_VERSION_MINOR = ${VERSION_MINOR_VAL}" >> trexio_f.f90
-echo "integer(c_int32_t) :: TREXIO_VERSION_PATCH = ${VERSION_PATCH_VAL}" >> trexio_f.f90
+echo "integer :: TREXIO_VERSION_MAJOR = ${VERSION_MAJOR_VAL}" >> trexio_f.f90
+echo "integer :: TREXIO_VERSION_MINOR = ${VERSION_MINOR_VAL}" >> trexio_f.f90
+echo "integer :: TREXIO_VERSION_PATCH = ${VERSION_PATCH_VAL}" >> trexio_f.f90
 echo "" >> trexio_f.f90
 
 # c front end
@@ -48,4 +48,3 @@ cat populated/pop_*.py >> trexio.py
 cat suffix_s_front.h >> trexio_s.h
 cat suffix_front.h   >> trexio.h
 cat suffix_fortran.f90 >> trexio_f.f90
-