diff --git a/hwc2_device/HwcDisplay.h b/hwc2_device/HwcDisplay.h
index 8dc059c..ad58ae8 100644
--- a/hwc2_device/HwcDisplay.h
+++ b/hwc2_device/HwcDisplay.h
@@ -101,10 +101,10 @@
   // Present previously staged properties, and return fences to indicate when
   // the new content has been presented, and when the previous buffers have
   // been released.
-  using ReleaseFence = std::pair<hwc2_layer_t, int32_t>;
-  auto PresentStagedComposition(int32_t *out_present_fence,
-                                std::vector<ReleaseFence> *out_release_fences)
-      -> HWC2::Error;
+  using ReleaseFence = std::pair<hwc2_layer_t, SharedFd>;
+  auto PresentStagedComposition(SharedFd &out_present_fence,
+                                std::vector<ReleaseFence> &out_release_fences)
+      -> bool;
 
   // HWC2 Hooks - these should not be used outside of the hwc2 device.
   HWC2::Error AcceptDisplayChanges();