diff --git a/hwc2_device/HwcDisplay.h b/hwc2_device/HwcDisplay.h
index 8ff9a92..cd33ebe 100644
--- a/hwc2_device/HwcDisplay.h
+++ b/hwc2_device/HwcDisplay.h
@@ -106,7 +106,7 @@
                                  float *min_luminance);
   HWC2::Error GetReleaseFences(uint32_t *num_elements, hwc2_layer_t *layers,
                                int32_t *fences);
-  HWC2::Error PresentDisplay(int32_t *present_fence);
+  HWC2::Error PresentDisplay(int32_t *out_present_fence);
   HWC2::Error SetActiveConfig(hwc2_config_t config);
   HWC2::Error ChosePreferredConfig();
   HWC2::Error SetClientTarget(buffer_handle_t target, int32_t acquire_fence,
@@ -199,6 +199,8 @@
 
   DrmHwcTwo *const hwc2_;
 
+  UniqueFd present_fence_;
+
   std::optional<DrmMode> staged_mode_;
   int64_t staged_mode_change_time_{};
   uint32_t staged_mode_config_id_{};