php52error

/usr/local/src/php-5.2.17/ext/dom/node.c: In function 'dom_canonicalization':
/usr/local/src/php-5.2.17/ext/dom/node.c:1953:21: error: dereferencing pointer to incomplete type
    ret = buf->buffer->use;
                     ^
In file included from /usr/local/src/php-5.2.17/main/php.h:38:0,
                 from /usr/local/src/php-5.2.17/ext/dom/node.c:26:
/usr/local/src/php-5.2.17/ext/dom/node.c:1955:40: error: dereferencing pointer to incomplete type
     RETVAL_STRINGL((char *) buf->buffer->content, ret, 1);
                                        ^
/usr/local/src/php-5.2.17/Zend/zend_API.h:472:14: note: in definition of macro 'ZVAL_STRINGL'
   char *__s=(s); int __l=l;  \
              ^
/usr/local/src/php-5.2.17/ext/dom/node.c:1955:5: note: in expansion of macro 'RETVAL_STRINGL'
     RETVAL_STRINGL((char *) buf->buffer->content, ret, 1);
     ^
make: *** [ext/dom/node.lo] Error 1