diff --git a/proxmox/Cargo.toml b/proxmox/Cargo.toml
index b1485b77..008b23c0 100644
--- a/proxmox/Cargo.toml
+++ b/proxmox/Cargo.toml
@@ -57,7 +57,7 @@ api-macro = ["proxmox-api-macro"]
 test-harness = []
 cli = [ "router", "hyper", "tokio" ]
 router = [ "hyper", "tokio" ]
-websocket = [ "tokio" ]
+websocket = [ "tokio", "futures" ]
 
 # tools:
 #valgrind = ["proxmox-tools/valgrind"]
diff --git a/proxmox/src/tools/byte_buffer.rs b/proxmox/src/tools/byte_buffer.rs
index 54f03dd1..abfa6c8a 100644
--- a/proxmox/src/tools/byte_buffer.rs
+++ b/proxmox/src/tools/byte_buffer.rs
@@ -21,7 +21,7 @@ use std::io::{Read, Result};
 
 use crate::tools::vec;
 
-#[cfg(features = "tokio")]
+#[cfg(feature = "tokio")]
 use tokio::io::{AsyncRead, AsyncReadExt};
 
 /// A Buffer that holds bytes (u8)
@@ -160,7 +160,7 @@ impl ByteBuffer {
 
     /// Same as read_from, but for reader that implement tokio::io::AsyncRead.
     /// See [read_from](#method.read_from) for an example
-    #[cfg(features = "tokio")]
+    #[cfg(feature = "tokio")]
     pub async fn read_from_async<T: AsyncRead + Unpin>(&mut self, input: &mut T) -> Result<usize> {
         let amount = input.read(self.get_free_mut_slice()).await?;
         self.add_size(amount);
diff --git a/proxmox/src/tools/mod.rs b/proxmox/src/tools/mod.rs
index b6018c47..bc2622b6 100644
--- a/proxmox/src/tools/mod.rs
+++ b/proxmox/src/tools/mod.rs
@@ -20,7 +20,7 @@ pub mod time;
 pub mod uuid;
 pub mod vec;
 
-#[cfg(features = "websocket")]
+#[cfg(feature = "websocket")]
 pub mod websocket;
 
 #[doc(inline)]