diff --git a/config.h.in b/config.h.in
index 3dbc35468..5dfe95a91 100644
--- a/config.h.in
+++ b/config.h.in
@@ -647,9 +647,6 @@
 /* Define to 1 if you have the `pread' function. */
 #undef HAVE_PREAD
 
-/* Define to 1 if you have the `pread64' function. */
-#undef HAVE_PREAD64
-
 /* Define to 1 if you have the `priv_set' function. */
 #undef HAVE_PRIV_SET
 
@@ -677,9 +674,6 @@
 /* Define to 1 if you have the `pwrite' function. */
 #undef HAVE_PWRITE
 
-/* Define to 1 if you have the `pwrite64' function. */
-#undef HAVE_PWRITE64
-
 /* Define to 1 if you have the `pw_dup' function. */
 #undef HAVE_PW_DUP
 
@@ -1332,10 +1326,6 @@
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 
-/* Define to 1 to enable 64-bit versions of standard C functions on 32-bit
-   systems. */
-#undef _LARGEFILE64_SOURCE
-
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
diff --git a/configure b/configure
index 29c381183..5ad31f30d 100755
--- a/configure
+++ b/configure
@@ -20061,33 +20061,6 @@ if test "x$ac_cv_func_pread" = xyes
 then :
   printf "%s\n" "#define HAVE_PREAD 1" >>confdefs.h
 
-    # pread(2) on 32-bit HP-UX 11.00 is buggy, use pread64(2) instead.
-    case "$host_os" in
-	hpux*|hiuxmpp*)
-	    O_CPPFLAGS="$CPPFLAGS"
-	    CPPFLAGS="$CPPFLAGS -D_LARGEFILE64_SOURCE"
-
-  for ac_func in pread64 pwrite64
-do :
-  as_ac_var=`printf "%s\n" "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"
-then :
-  cat >>confdefs.h <<_ACEOF
-#define `printf "%s\n" "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-
-printf "%s\n" "#define _LARGEFILE64_SOURCE 1" >>confdefs.h
-
-
-fi
-
-done
-	    CPPFLAGS="$O_CPPFLAGS"
-	    ;;
-    esac
-
 else $as_nop
 
     case " $LIBOBJS " in
diff --git a/configure.ac b/configure.ac
index 9be88600b..9b173a5ec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2689,19 +2689,7 @@ dnl Function checks
 dnl
 AC_FUNC_GETGROUPS
 AC_CHECK_FUNCS_ONCE([fexecve fmemopen killpg nl_langinfo faccessat wordexp getauxval fseeko])
-AC_CHECK_FUNCS([pread], [
-    # pread(2) on 32-bit HP-UX 11.00 is buggy, use pread64(2) instead.
-    case "$host_os" in
-	hpux*|hiuxmpp*)
-	    O_CPPFLAGS="$CPPFLAGS"
-	    CPPFLAGS="$CPPFLAGS -D_LARGEFILE64_SOURCE"
-	    AC_CHECK_FUNCS([pread64 pwrite64], [
-		AC_DEFINE([_LARGEFILE64_SOURCE], [1], [Define to 1 to enable 64-bit versions of standard C functions on 32-bit systems.])
-	    ])
-	    CPPFLAGS="$O_CPPFLAGS"
-	    ;;
-    esac
-], [
+AC_CHECK_FUNCS([pread], [], [
     AC_LIBOBJ(pread)
     SUDO_APPEND_COMPAT_EXP(sudo_pread)
 ])