diff --git a/book/src/client.md b/book/src/client.md
index 2bf996bd1..b298bdf74 100644
--- a/book/src/client.md
+++ b/book/src/client.md
@@ -348,7 +348,7 @@ async fn main() -> Result<()> {
 
     let proxy = SystemdManagerProxy::new(&connection).await?;
     println!("Host architecture: {}", proxy.architecture().await?);
-    println!("Environment:");
+    println!("Environment variables:");
     for env in proxy.environment().await? {
         println!("  {}", env);
     }