diff --git a/RFC-00xx-automatic-implicit-differentiation.md b/RFC-00xx-automatic-implicit-differentiation.md
index 5b59cedf..f819004c 100644
--- a/RFC-00xx-automatic-implicit-differentiation.md
+++ b/RFC-00xx-automatic-implicit-differentiation.md
@@ -267,6 +267,8 @@ def fixed_point(f: Callable, g: Callable):
 
 #### Root-Finding 
 
+#### Non-Linear Least Squares
+
 ## Metrics
 
 <details>