diff --git a/51-php/02.md b/51-php/02.md
index ab84711..37b7911 100644
--- a/51-php/02.md
+++ b/51-php/02.md
@@ -129,7 +129,7 @@ See: [Metaphor](../articles/metaphor.md)
 
 ### How does Paul speak About Timothy?
 
-[2:19, s:20]
+[2:19, 2:20]
 
 Paul trained Timothy, that is, he taught him to serve God and be a leader in the church. Because Paul could not visit the Christians in Philippi, he sent Timothy instead. He was sure that Timothy would serve Jesus well.