diff --git a/theorems/T000836.md b/theorems/T000836.md
index 684d91433..ea0684d0e 100644
--- a/theorems/T000836.md
+++ b/theorems/T000836.md
@@ -11,4 +11,4 @@ refs:
     name: General Topology (Engelking, 1989)
 ---
 
-Jones' lemma, see Corollary 2.10 in {{zb:0684.54001}}.
+Jones' lemma, see Corollary 2.1.10 in {{zb:0684.54001}}.