diff --git a/libs/gui/CpuConsumer.cpp b/libs/gui/CpuConsumer.cpp
index 3db46bc..bff55d1 100644
--- a/libs/gui/CpuConsumer.cpp
+++ b/libs/gui/CpuConsumer.cpp
@@ -72,7 +72,9 @@
 
     if (!nativeBuffer) return BAD_VALUE;
     if (mCurrentLockedBuffers == mMaxLockedBuffers) {
-        return INVALID_OPERATION;
+        CC_LOGW("Max buffers have been locked (%d), cannot lock anymore.",
+                mMaxLockedBuffers);
+        return NOT_ENOUGH_DATA;
     }
 
     BufferQueue::BufferItem b;