diff --git a/docs/src/fortran/lib/constants.rst b/docs/src/fortran/lib/constants.rst
index d1b8f9fc..67c3ebf2 100644
--- a/docs/src/fortran/lib/constants.rst
+++ b/docs/src/fortran/lib/constants.rst
@@ -11,8 +11,6 @@ View source code :source:`fortran/include/constants.f90`
     :type: integer
 .. f:variable:: i18t
     :type: integer
-.. f:variable:: imaxt
-    :type: integer
 
     A set of digit type constraints that denote how many decimal digits a number can support.
     They are given as ``i<len>t`` or ``r<len>_<exp>t``
diff --git a/fortran/src/include/constants.f90 b/fortran/src/include/constants.f90
index 05617081..329b2793 100644
--- a/fortran/src/include/constants.f90
+++ b/fortran/src/include/constants.f90
@@ -4,16 +4,6 @@ module constants
     integer, parameter :: i1t = selected_int_kind(1)
     integer, parameter :: i4t = selected_int_kind(4)
     integer, parameter :: i18t = selected_int_kind(18)
-    integer :: imaxt
-    if (selected_int_kind(38) >= 0) then
-        imaxt = selected_int_kind(38)
-    elseif (i18t >= 0) then
-        imaxt = i18t
-    else
-        ! fall back to default value of 64-bit in most compilers
-        imaxt = 8
-        i18t = 8
-    end if
 
     integer(i1t), parameter :: errort = 0
     integer(i1t), parameter :: int64t = 1