diff --git a/content/katedra/pracovnici/topfer/index.md b/content/katedra/pracovnici/topfer/index.md
index 1b4faf7..5f1d7dd 100644
--- a/content/katedra/pracovnici/topfer/index.md
+++ b/content/katedra/pracovnici/topfer/index.md
@@ -5,5 +5,6 @@ weight = 0
 [extra]
 group = "ucitele"
 email = "pavel.topfer@pedf.cuni.cz"
+sis = "62820"
 +++