--- a/auto/types/sizeof
+++ b/auto/types/sizeof
@@ -3,14 +3,15 @@ echo $ngx_n "checking for $ngx_type size
 echo >> $NGX_ERR
 echo "checking for $ngx_type size" >> $NGX_ERR
 
-ngx_bytes=
+ngx_size=
 
 cat << END > $NGX_AUTOTEST.c
 
 #include <sys/types.h>
 #include <sys/time.h>
+$NGX_UNISTD_H
+#include <signal.h>
 #include <sys/resource.h>
-$NGX_UNISTD_H
 $NGX_INTTYPES_H
 $NGX_AUTO_CONFIG
 
@@ -24,27 +25,31 @@ END
 eval "$CC $CC_TEST_FLAGS -o $NGX_AUTOTEST $NGX_AUTOTEST.c >> $NGX_ERR 2>&1"
 
 if [ -x $NGX_AUTOTEST ]; then
-    ngx_bytes=`$NGX_AUTOTEST`
-    echo " $ngx_bytes bytes"
+    ngx_size=`$NGX_AUTOTEST`
+    echo " $ngx_size bytes"
 fi
 
 rm $NGX_AUTOTEST*
 
-case $ngx_bytes in
+case $ngx_size in
     4)
         if [ "$ngx_type"="long" ]; then
-            ngx_max_size=2147483647L
+            ngx_max_value=2147483647L
         else
-            ngx_max_size=2147483647
+            ngx_max_value=2147483647
         fi
+
+        ngx_max_len='sizeof("-2147483648") - 1'
     ;;
 
     8)
         if [ "$ngx_type"="long long" ]; then
-            ngx_max_size=9223372036854775807LL
+            ngx_max_value=9223372036854775807LL
         else
-            ngx_max_size=9223372036854775807L
+            ngx_max_value=9223372036854775807L
         fi
+
+        ngx_max_len='sizeof("-9223372036854775808") - 1'
     ;;
 
     *)