diff --git a/src/generate_curl_options_list.sh b/src/generate_curl_options_list.sh
index 9e88054..a8c3c7d 100755
--- a/src/generate_curl_options_list.sh
+++ b/src/generate_curl_options_list.sh
@@ -2,6 +2,20 @@
 
 root=`dirname $0`
 
+if [ "$NODE_CURL_H" != "" ] ; then
+  if [ ! -f "$NODE_CURL_H" ] ; then
+    echo "cannot find curl's header file $NODE_CURL_H ."
+    exit 1
+  fi
+  curl_header=$NODE_CURL_H
+elif [ -f "/usr/local/include/curl/curl.h" ] ; then
+  curl_header="/usr/local/include/curl/curl.h"
+elif [ -f "/usr/include/curl/curl.h" ] ; then
+  curl_header="/usr/include/curl/curl.h"
+fi
+
+echo "extract constants from $curl_header"
+
 generate() {
   name=$1
   pattern=$2
@@ -10,7 +24,7 @@ generate() {
   (
     echo "// generated by $0 at $(date)"
     echo "CurlOption $name[] = {"
-    cat /usr/include/curl/curl.h|perl -ne "/$pattern/i && print \"\t{\\\"\$1\\\", CURL${prefix}_\$1},\n\""
+    cat "$curl_header"|perl -ne "/$pattern/i && print \"\t{\\\"\$1\\\", CURL${prefix}_\$1},\n\""
     echo '};'
   ) > $root/$name.h
 }