diff --git a/docs/PUBLIC_API.md b/docs/PUBLIC_API.md
index 6fc7b7e68b..cb1e2e94a2 100644
--- a/docs/PUBLIC_API.md
+++ b/docs/PUBLIC_API.md
@@ -37,7 +37,7 @@ We explicitly don't consider the following to be our public API surface:
 
 - any file/import paths within our package except for the `/`, `/testing` and `/bundles/*` and other documented package entry-points.
 - constructors of injectable classes (services and directives) - please use DI to obtain instances of these classes
-- any class members or symbols marked as `private`, or prefixed with underscore (`_`), [barred latin o](https://en.wikipedia.org/wiki/%C6%9F) (`ɵ`), and  [latin delta](https://en.wikipedia.org/wiki/Delta_(letter)) (`Δ`).
+- any class members or symbols marked as `private`, or prefixed with underscore (`_`), [barred latin o](https://en.wikipedia.org/wiki/%C6%9F) (`ɵ`), and  [greek delta](https://en.wikipedia.org/wiki/Delta_(letter)) (`Δ`).
 - extending any of our classes unless the support for this is specifically documented in the API docs
 - the contents and API surface of the code generated by Angular's compiler (with one notable exception: the existence and name of `NgModuleFactory` instances exported from generated code is guaranteed)