diff --git a/asyncpg/types.py b/asyncpg/types.py
index 04b25c29..44299f64 100644
--- a/asyncpg/types.py
+++ b/asyncpg/types.py
@@ -322,7 +322,7 @@ def B(self):
 
     @property
     def C(self):
-        return self[1]
+        return self[2]
 
 
 class LineSegment(tuple):