diff --git a/presence/fpp/fpp_c_ffi/include/presence_detector.h b/presence/fpp/fpp_c_ffi/include/presence_detector.h
index a2b5c0c3..7bc03aa5 100644
--- a/presence/fpp/fpp_c_ffi/include/presence_detector.h
+++ b/presence/fpp/fpp_c_ffi/include/presence_detector.h
@@ -106,7 +106,7 @@ struct ProximityEstimate {
   /// Measurement confidence of the estimate
   MeasurementConfidence distance_confidence;
   /// The time the proximity estimate was obtained
-  u128 elapsed_real_time_millis;
+  uint64_t elapsed_real_time_millis;
   /// Proximity state zone of the nearby device
   ProximityState proximity_state;
   /// Medium through which the proximity estimate was computed
@@ -141,8 +141,6 @@ int32_t get_proximity_estimate(PresenceDetectorHandle presence_detector_handle,
 /// De-allocates memory for a presence detector object
 int presence_detector_free(PresenceDetectorHandle presence_detector_handle);
 
-}  // extern "C"
-
 #ifdef __cplusplus
 }  // extern "C"
 #endif