diff --git a/src/client/request.rs b/src/client/request.rs
index d3f6ebdb..bb338482 100644
--- a/src/client/request.rs
+++ b/src/client/request.rs
@@ -615,7 +615,10 @@ impl ClientRequestBuilder {
                 true
             };
             if !contains {
-                self.header(header::USER_AGENT, "Actix-web");
+                self.header(
+                    header::USER_AGENT,
+                    concat!("Actix-web/", env!("CARGO_PKG_VERSION")),
+                );
             }
         }
 
diff --git a/tests/test_client.rs b/tests/test_client.rs
index cd47583c..3128bb94 100644
--- a/tests/test_client.rs
+++ b/tests/test_client.rs
@@ -440,7 +440,11 @@ fn test_default_headers() {
     let request = srv.get().finish().unwrap();
     let repr = format!("{:?}", request);
     assert!(repr.contains("\"accept-encoding\": \"gzip, deflate\""));
-    assert!(repr.contains("\"user-agent\": \"Actix-web\""));
+    assert!(repr.contains(concat!(
+        "\"user-agent\": \"Actix-web/",
+        env!("CARGO_PKG_VERSION"),
+        "\""
+    )));
 
     let request_override = srv.get()
         .header("User-Agent", "test")
@@ -448,5 +452,9 @@ fn test_default_headers() {
         .unwrap();
     let repr_override = format!("{:?}", request_override);
     assert!(repr_override.contains("\"user-agent\": \"test\""));
-    assert!(!repr_override.contains("\"user-agent\": \"Actix-web\""));
+    assert!(!repr_override.contains(concat!(
+        "\"user-agent\": \"Actix-web/",
+        env!("CARGO_PKG_VERSION"),
+        "\""
+    )));
 }