diff --git a/docs/src/API/blocks.md b/docs/src/API/blocks.md
index 0c113fbdc..11f241fd7 100644
--- a/docs/src/API/blocks.md
+++ b/docs/src/API/blocks.md
@@ -80,6 +80,7 @@ Derivative
 FirstOrder
 SecondOrder
 StateSpace
+TransferFunction
 PI
 LimPI
 PID