diff --git a/media/libmedia/IMediaSource.cpp b/media/libmedia/IMediaSource.cpp
index fdbc869..724b3a0 100644
--- a/media/libmedia/IMediaSource.cpp
+++ b/media/libmedia/IMediaSource.cpp
@@ -389,7 +389,7 @@
                     }
                 }
                 if (transferBuf != nullptr) { // Using shared buffers.
-                    if (!transferBuf->isObserved()) {
+                    if (!transferBuf->isObserved() && transferBuf != buf) {
                         // Transfer buffer must be part of a MediaBufferGroup.
                         ALOGV("adding shared memory buffer %p to local group", transferBuf);
                         mGroup->add_buffer(transferBuf);