diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 79a11d2..406bd54 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -689,6 +689,8 @@
                                   uint32_t code, const Parcel& data,
                                   Parcel* reply, uint32_t flags)
 {
+    LOG_ALWAYS_FATAL_IF(data.isForRpc(), "Parcel constructed for RPC, but being used with binder.");
+
     status_t err;
 
     flags |= TF_ACCEPT_FDS;