diff --git a/ext/pdo/pdo_stmt.c b/ext/pdo/pdo_stmt.c
index e2d525c3cab..af0c5d3cf58 100755
--- a/ext/pdo/pdo_stmt.c
+++ b/ext/pdo/pdo_stmt.c
@@ -800,7 +800,7 @@ static int do_fetch(pdo_stmt_t *stmt, int do_bind, zval *return_value,
 					fetch_value(stmt, &val, i++ TSRMLS_CC);
 					if (Z_TYPE(val) != IS_NULL) {
 						convert_to_text(&val);
-						if (zend_u_lookup_class(Z_TYPE(val), Z_STRVAL(val), Z_STRLEN(val), &cep TSRMLS_CC) == FAILURE) {
+						if (zend_u_lookup_class(Z_TYPE(val), Z_UNIVAL(val), Z_UNILEN(val), &cep TSRMLS_CC) == FAILURE) {
 							stmt->fetch.cls.ce = ZEND_STANDARD_CLASS_DEF_PTR;
 						} else {
 							stmt->fetch.cls.ce = *cep;