diff --git a/libs/gui/BufferQueueConsumer.cpp b/libs/gui/BufferQueueConsumer.cpp
index 525938e..96f7829 100644
--- a/libs/gui/BufferQueueConsumer.cpp
+++ b/libs/gui/BufferQueueConsumer.cpp
@@ -714,6 +714,7 @@
 }
 
 sp<NativeHandle> BufferQueueConsumer::getSidebandStream() const {
+    Mutex::Autolock lock(mCore->mMutex);
     return mCore->mSidebandStream;
 }
 
diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index 234a863..09e7cb6 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -1333,6 +1333,7 @@
 
 String8 BufferQueueProducer::getConsumerName() const {
     ATRACE_CALL();
+    Mutex::Autolock lock(mCore->mMutex);
     BQ_LOGV("getConsumerName: %s", mConsumerName.string());
     return mConsumerName;
 }