diff --git a/test/p3/src_p3/lib.rs b/test/p3/src_p3/lib.rs
index b2b122bf..65156ca6 100644
--- a/test/p3/src_p3/lib.rs
+++ b/test/p3/src_p3/lib.rs
@@ -1,12 +1,18 @@
-// P3 test component — async interface
+// P3 test component — async on WASM, sync on host
 use hello_p3_bindings::exports::hello::interfaces::greeting::Guest;
 
 struct Component;
 
 impl Guest for Component {
+    #[cfg(target_arch = "wasm32")]
     async fn greet(name: String) -> String {
         format!("Hello, {}! (P3 async)", name)
     }
+
+    #[cfg(not(target_arch = "wasm32"))]
+    fn greet(name: String) -> String {
+        format!("Hello, {}! (P3 host)", name)
+    }
 }
 
 hello_p3_bindings::export!(Component with_types_in hello_p3_bindings);