diff --git a/proton b/proton
index 2cd43115..8bec9466 100755
--- a/proton
+++ b/proton
@@ -1555,7 +1555,7 @@ class Session:
         if remote_debug_proc:
             remote_debug_proc.kill()
             try:
-                remote_debug_proc.communicate(2)
+                remote_debug_proc.communicate(timeout=2)
             except subprocess.TimeoutExpired:
                 log("terminate remote debugger")
                 remote_debug_proc.terminate()