diff --git a/libs/gui/IGraphicBufferConsumer.cpp b/libs/gui/IGraphicBufferConsumer.cpp
index c4660bad8..7ae82e056 100644
--- a/libs/gui/IGraphicBufferConsumer.cpp
+++ b/libs/gui/IGraphicBufferConsumer.cpp
@@ -349,7 +349,7 @@ status_t BnGraphicBufferConsumer::onTransact(
         }
         case GET_RELEASED_BUFFERS: {
             CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
-            uint64_t slotMask;
+            uint64_t slotMask = 0;
             status_t result = getReleasedBuffers(&slotMask);
             reply->writeInt64(static_cast<int64_t>(slotMask));
             reply->writeInt32(result);
diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index 1099c84f8..c3c62358f 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -435,6 +435,7 @@ status_t BnGraphicBufferProducer::onTransact(
             QueueBufferOutput* const output =
                     reinterpret_cast<QueueBufferOutput *>(
                             reply->writeInplace(sizeof(QueueBufferOutput)));
+            memset(output, 0, sizeof(QueueBufferOutput));
             status_t res = connect(listener, api, producerControlledByApp, output);
             reply->writeInt32(res);
             return NO_ERROR;