diff --git a/swift/TailscaleKit/OutgoingConnection.swift b/swift/TailscaleKit/OutgoingConnection.swift
index 97195f9..483ba2d 100644
--- a/swift/TailscaleKit/OutgoingConnection.swift
+++ b/swift/TailscaleKit/OutgoingConnection.swift
@@ -101,8 +101,10 @@ public actor OutgoingConnection {
             throw TailscaleError.connectionClosed
         }
 
-        let bytesWritten = Darwin.write(conn, data.withUnsafeBytes { $0.baseAddress! }, data.count)
-
+        let bytesWritten = data.withUnsafeBytes { bytes in
+            Darwin.write(conn, bytes.baseAddress, bytes.count)
+        }
+        
         if bytesWritten != data.count {
             throw TailscaleError.shortWrite
         }