diff -urN php-5.1.2.org/ext/curl/interface.c php-5.1.2/ext/curl/interface.c
--- php-5.1.2.org/ext/curl/interface.c	2006-01-05 19:07:55.000000000 +0100
+++ php-5.1.2/ext/curl/interface.c	2006-01-25 14:42:08.980963000 +0100
@@ -476,6 +476,8 @@
 }
 /* }}} */
 
+static void php_restore_callbacks(void);
+
 /* {{{ PHP_MSHUTDOWN_FUNCTION
  */
 PHP_MSHUTDOWN_FUNCTION(curl)
@@ -486,6 +488,7 @@
 	php_unregister_url_stream_wrapper("ftp" TSRMLS_CC);
 	php_unregister_url_stream_wrapper("ldap" TSRMLS_CC);
 #endif
+	php_restore_callbacks();
 	curl_global_cleanup();
 #ifdef PHP_CURL_NEED_SSL_TSL
 	php_curl_ssl_cleanup();
@@ -1621,9 +1624,8 @@
 	for (i = 0; i < c; ++i) {
 		php_curl_openssl_tsl[i] = tsrm_mutex_alloc();
 	}
-	
-	CRYPTO_set_id_callback(php_curl_ssl_id);
-	CRYPTO_set_locking_callback(php_curl_ssl_lock);
+
+	php_restore_callbacks();	
 }
 
 static inline void php_curl_ssl_cleanup(void)
@@ -1645,6 +1647,17 @@
 #endif /* PHP_CURL_NEED_OPENSSL_TSL */
 /* }}} */
 
+static void php_restore_callbacks(void) {
+#ifdef PHP_CURL_NEED_OPENSSL_TSL
+	CRYPTO_set_id_callback(php_curl_ssl_id);
+	CRYPTO_set_locking_callback(php_curl_ssl_lock);
+#else
+	CRYPTO_set_id_callback(NULL);
+	CRYPTO_set_locking_callback(NULL);
+#endif
+}
+	
+
 #ifdef PHP_CURL_NEED_GNUTLS_TSL
 /* {{{ */
 static int php_curl_ssl_mutex_create(void **m)