diff --git a/src/fckit/module/fckit_refcount.F90 b/src/fckit/module/fckit_refcount.F90
index e878ab0..3542c9c 100644
--- a/src/fckit/module/fckit_refcount.F90
+++ b/src/fckit/module/fckit_refcount.F90
@@ -117,12 +117,10 @@ subroutine allocate_fckit_external(refcount,shared_ptr)
   FCKIT_SUPPRESS_UNUSED( shared_ptr )
 end subroutine
 
-#ifndef NAG
-function fckit_external() result(funptr)
+subroutine fckit_external (funptr)
   procedure(fckit_refcount_interface), pointer :: funptr
   funptr => allocate_fckit_external
-end function
-#endif
+end subroutine fckit_external
 
 #if FCKIT_HAVE_ECKIT
 subroutine allocate_fckit_refcount_owned(refcount,shared_ptr)
@@ -142,12 +140,10 @@ subroutine allocate_fckit_refcount_owned(refcount,shared_ptr)
   end select
 end subroutine
 
-#ifndef NAG
-function fckit_owned() result(funptr)
+subroutine fckit_owned(funptr)
   procedure(fckit_refcount_interface), pointer :: funptr
   funptr => allocate_fckit_refcount_owned
-end function
-#endif
+end subroutine fckit_owned
 
 #endif
 
diff --git a/src/fckit/module/fckit_shared_ptr.F90 b/src/fckit/module/fckit_shared_ptr.F90
index 0529abd..31a8bf2 100644
--- a/src/fckit/module/fckit_shared_ptr.F90
+++ b/src/fckit/module/fckit_shared_ptr.F90
@@ -337,9 +337,7 @@ subroutine share( this, ptr, refcount )
   if( present(refcount) ) then
     call c_f_procpointer( refcount, opt_refcount )
   else
-#ifndef NAG
-    opt_refcount => fckit_external()
-#endif
+    call fckit_external(opt_refcount)
   endif
   this%shared_ptr_ => ptr
   this%is_null_ = .not. associated( this%shared_ptr_ )