diff --git a/p2p_manager.cc b/p2p_manager.cc
index 127e5ff..bcfe156 100644
--- a/p2p_manager.cc
+++ b/p2p_manager.cc
@@ -396,7 +396,10 @@
 
     // We expect to run just "p2p-client" and find it in the path.
     child_pid_ = Subprocess::Get().ExecFlags(
-        cmd, Subprocess::kSearchPath, {},
+        cmd,
+        Subprocess::kSearchPath,
+        {},
+        nullptr,
         Bind(&LookupData::OnLookupDone, base::Unretained(this)));
 
     if (!child_pid_) {