diff --git a/sf-replay/include/ReplayH5Reader.hpp b/sf-replay/include/ReplayH5Reader.hpp
index b242433..b9e9943 100644
--- a/sf-replay/include/ReplayH5Reader.hpp
+++ b/sf-replay/include/ReplayH5Reader.hpp
@@ -12,8 +12,8 @@ class ReplayH5Reader {
 
     const std::string device_;
     const std::string channel_name_;
-    const uint64_t stop_pulse_id_;
     const uint16_t source_id_;
+    const uint64_t stop_pulse_id_;
 
     H5::H5File current_file_;
     std::string current_filename_;