diff --git a/common/main/cpp/native_c4btsocketfactory.cc b/common/main/cpp/native_c4btsocketfactory.cc
index 74efcdce9..1db773bf7 100644
--- a/common/main/cpp/native_c4btsocketfactory.cc
+++ b/common/main/cpp/native_c4btsocketfactory.cc
@@ -177,7 +177,7 @@ static void btAttached(C4Socket* socket) {
         return;
     }
 
-    jstring jPeerID = env->NewStringUTF((const char *)ctx->peerID.buf);
+    jstring jPeerID = toJString(env, ctx->peerID);
 
     // Balanced by the c4socket_release in NativeC4Socket_closed. Mirrors btOpen.
     c4socket_retain(socket);