diff --git a/Cargo.lock b/Cargo.lock
index d3f9164..8280520 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -195,6 +195,7 @@ dependencies = [
  "console-subscriber",
  "enumflags2",
  "event-listener",
+ "fastrand",
  "futures-util",
  "nix",
  "ntest",
@@ -422,9 +423,9 @@ dependencies = [
 
 [[package]]
 name = "fastrand"
-version = "2.0.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
+checksum = "486f806e73c5707928240ddc295403b1b93c96a02038563881c4a2fd84b81ac4"
 
 [[package]]
 name = "flate2"
diff --git a/Cargo.toml b/Cargo.toml
index 24a3ce9..ca5bf6f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,6 +47,7 @@ enumflags2 = "0.7.9"
 console-subscriber = { version = "0.4.0", optional = true }
 xdg-home = "1.1.0"
 event-listener = "5.3.0"
+fastrand = "2.2.0"
 
 [target.'cfg(unix)'.dependencies]
 nix = { version = "0.29.0", features = ["user"] }
diff --git a/src/bus/mod.rs b/src/bus/mod.rs
index 1ca1c80..fc686dd 100644
--- a/src/bus/mod.rs
+++ b/src/bus/mod.rs
@@ -164,8 +164,16 @@ impl Bus {
 
                 addr
             }
-            UnixSocket::Dir(_) => bail!("`dir` transport is not supported (yet)."),
-            UnixSocket::TmpDir(_) => bail!("`tmpdir` transport is not supported (yet)."),
+            UnixSocket::Dir(dir) | UnixSocket::TmpDir(dir) => {
+                let path = dir.join(format!("dbus-{}", fastrand::u32(1_000_000..u32::MAX)));
+                let addr = SocketAddr::from_pathname(&path)?;
+                info!(
+                    "Listening on UNIX socket file `{}`.",
+                    path.to_string_lossy()
+                );
+
+                addr
+            }
             _ => bail!("Unsupported address."),
         };
         let std_listener =
@@ -250,9 +258,8 @@ fn default_address() -> String {
                 .join("user")
                 .join(format!("{}", nix::unistd::Uid::current()))
         });
-    let path = runtime_dir.join("busd-session");
 
-    format!("unix:path={}", path.display())
+    format!("unix:dir={}", runtime_dir.display())
 }
 
 #[cfg(not(unix))]