diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index a6a9712..c00526d 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -235,6 +235,15 @@
     return mConsumer->setDefaultBufferDataSpace(defaultDataSpace);
 }
 
+status_t ConsumerBase::discardFreeBuffers() {
+    Mutex::Autolock _l(mMutex);
+    if (mAbandoned) {
+        CB_LOGE("discardFreeBuffers: ConsumerBase is abandoned!");
+        return NO_INIT;
+    }
+    return mConsumer->discardFreeBuffers();
+}
+
 void ConsumerBase::dump(String8& result) const {
     dump(result, "");
 }