diff --git a/backend/BackendRCarDu.cpp b/backend/BackendRCarDu.cpp
index b012797..9adfa62 100644
--- a/backend/BackendRCarDu.cpp
+++ b/backend/BackendRCarDu.cpp
@@ -28,7 +28,7 @@
 
   int ret = BufferInfoGetter::GetInstance()->ConvertBoInfo(layer->buffer(),
                                                            &bo);
-  if (ret)
+  if (ret != 0)
     return true;
 
   if (bo.format == DRM_FORMAT_ABGR8888)