diff --git a/zero-framework.el b/zero-framework.el
index e198262bc06f0c219c6433fe20a37e173e0234e9..c58be182ff99fbeccb206bf499a4a0521fccda30 100644
--- a/zero-framework.el
+++ b/zero-framework.el
@@ -195,7 +195,7 @@ if t, `zero-debug' will output debug msg in *zero-debug* buffer")
      candidates-on-page
      `(("in_emacs" t)
        ("filename" ,(or (buffer-file-name) ""))
-       ("page_number" ,zero-current-page)
+       ("page_number" ,(1+ zero-current-page))
        ("has_next_page" ,(or (> (length (or candidates zero-candidates)) (* zero-candidates-per-page (1+ zero-current-page))) (< zero-fetch-size (* zero-candidates-per-page (+ 2 zero-current-page)))))
        ("has_previous_page" ,(> zero-current-page 0))))
     (zero-debug "candidates:\n  %s\n  " (s-join "\n  " candidates-on-page))
diff --git a/zero-panel.el b/zero-panel.el
index abb007bf1a1d597fd4d5d87aecd42a7947acfe77..57d8a06e81fc766b3a045896f3520d4dd4960794 100644
--- a/zero-panel.el
+++ b/zero-panel.el
@@ -71,7 +71,7 @@ For example,
   "show candidates"
   (zero-panel-async-call "ShowCandidates" nil
 			 :string preedit_str
-			 :int32 candidate_length
+			 :uint32 candidate_length
 			 (or candidates '(:array))
 			 (zero-alist-to-asv hints)))