diff -Nru php-5.1.6.org/ext/curl/interface.c php-5.1.6.mod/ext/curl/interface.c
--- php-5.1.6.org/ext/curl/interface.c	2006-08-10 19:16:35.000000000 +0200
+++ php-5.1.6.mod/ext/curl/interface.c	2010-12-06 15:02:37.638109252 +0100
@@ -271,7 +271,9 @@
 	REGISTER_CURL_CONSTANT(CURLOPT_FTPAPPEND);
 	REGISTER_CURL_CONSTANT(CURLOPT_NETRC);
 	REGISTER_CURL_CONSTANT(CURLOPT_FOLLOWLOCATION);
+#if CURLOPT_FTPASCII != 0
 	REGISTER_CURL_CONSTANT(CURLOPT_FTPASCII);
+#endif
 	REGISTER_CURL_CONSTANT(CURLOPT_PUT);
 #if CURLOPT_MUTE != 0
 	REGISTER_CURL_CONSTANT(CURLOPT_MUTE);
@@ -311,7 +313,9 @@
 	REGISTER_CURL_CONSTANT(CURLOPT_FILETIME);
 	REGISTER_CURL_CONSTANT(CURLOPT_WRITEFUNCTION);
 	REGISTER_CURL_CONSTANT(CURLOPT_READFUNCTION);
+#if CURLOPT_PASSWDFUNCTION != 0
 	REGISTER_CURL_CONSTANT(CURLOPT_PASSWDFUNCTION);
+#endif
 	REGISTER_CURL_CONSTANT(CURLOPT_HEADERFUNCTION);
 	REGISTER_CURL_CONSTANT(CURLOPT_MAXREDIRS);
 	REGISTER_CURL_CONSTANT(CURLOPT_MAXCONNECTS);