diff --git a/lisp/progmodes/csharp-mode.el b/lisp/progmodes/csharp-mode.el
index 86b925afa7d..82285b4003d 100644
--- a/lisp/progmodes/csharp-mode.el
+++ b/lisp/progmodes/csharp-mode.el
@@ -1036,6 +1036,7 @@ function is called.  Subsequent calls return the first evaluated value."
                  (string_literal)
                  (binary_expression)
                  (invocation_expression)
+                 (await_expression)
                  (member_access_expression)
                  (conditional_expression)])