diff --git a/libs/gui/IGraphicBufferConsumer.cpp b/libs/gui/IGraphicBufferConsumer.cpp
index 9574b61..ea98296 100644
--- a/libs/gui/IGraphicBufferConsumer.cpp
+++ b/libs/gui/IGraphicBufferConsumer.cpp
@@ -410,7 +410,7 @@
         } break;
         case GET_RELEASED_BUFFERS: {
             CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
-            uint32_t slotMask;
+            uint32_t slotMask = 0;
             status_t result = getReleasedBuffers(&slotMask);
             reply->writeInt32(slotMask);
             reply->writeInt32(result);
diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index e713c04..6549a0c 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -249,6 +249,7 @@
             QueueBufferOutput* const output =
                     reinterpret_cast<QueueBufferOutput *>(
                             reply->writeInplace(sizeof(QueueBufferOutput)));
+            memset(output, 0, sizeof(QueueBufferOutput));
             status_t res = connect(token, api, producerControlledByApp, output);
             reply->writeInt32(res);
             return NO_ERROR;