new file mode 100644
--- /dev/null
+++ b/auto/types/uintptr_t
@@ -0,0 +1,40 @@
+
+# Copyright (C) Igor Sysoev
+
+
+echo $ngx_n "checking for uintptr_t ... " $ngx_c
+echo >> $NGX_ERR
+echo "checking for uintptr_t" >> $NGX_ERR
+
+found=no
+
+cat << END > $NGX_AUTOTEST.c
+
+#include <sys/types.h>
+$NGX_INTTYPES_H
+
+int main() {
+    uintptr_t i = 0;
+    return 0;
+}
+
+END
+
+eval "$CC -o $NGX_AUTOTEST $NGX_AUTOTEST.c >> $NGX_ERR 2>&1"
+
+if [ -x $NGX_AUTOTEST ]; then
+    echo " uintptr_t found"
+    found=yes
+else
+    echo $ngx_n " uintptr_t not found" $ngx_c
+fi
+
+rm $NGX_AUTOTEST*
+
+
+if [ $found = no ]; then
+    found="uint`expr 8 \* $ngx_ptr_size`_t"
+    echo ", $found used"
+
+    echo "typedef $found  uintptr_t;"   >> $NGX_AUTO_CONFIG_H
+fi