diff --git a/include/media/IOMX.h b/include/media/IOMX.h
index 10e0197..e551d17 100644
--- a/include/media/IOMX.h
+++ b/include/media/IOMX.h
@@ -84,9 +84,9 @@
     virtual status_t observe_node(
             node_id node, const sp<IOMXObserver> &observer) = 0;
 
-    virtual void fill_buffer(node_id node, buffer_id buffer) = 0;
+    virtual status_t fill_buffer(node_id node, buffer_id buffer) = 0;
 
-    virtual void empty_buffer(
+    virtual status_t empty_buffer(
             node_id node,
             buffer_id buffer,
             OMX_U32 range_offset, OMX_U32 range_length,