diff --git a/proxmox-lang/src/ops.rs b/proxmox-lang/src/ops.rs
index 6fd70d7e..8b0723ab 100644
--- a/proxmox-lang/src/ops.rs
+++ b/proxmox-lang/src/ops.rs
@@ -2,13 +2,16 @@
 
 /// Modeled after the nightly `std::ops::ControlFlow`.
 ///
-/// To be removed with rust 1.55.
+/// Will be removed with crate version 2.0.
 #[derive(Clone, Copy, Debug, PartialEq)]
+#[deprecated(since = "1.1", note = "use std::ops::ControlFlow")]
 pub enum ControlFlow<B, C = ()> {
     Continue(C),
     Break(B),
 }
 
+#[allow(deprecated)]
 impl<B> ControlFlow<B> {
+    #[deprecated(since = "1.1", note = "use std::ops::ControlFlow")]
     pub const CONTINUE: ControlFlow<B, ()> = ControlFlow::Continue(());
 }