diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index dee5309..805e576 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -411,8 +411,9 @@
 
 status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len)
 {
-    if (parcel->isForRpc() != isForRpc()) {
-        ALOGE("Cannot append Parcel of one format to another.");
+    if (mSession != parcel->mSession) {
+        ALOGE("Cannot append Parcel from one context to another. They may be different formats, "
+              "and objects are specific to a context.");
         return BAD_TYPE;
     }