diff --git a/include/openmc/mgxs.h b/include/openmc/mgxs.h
index 8d8ca4d8e6..e178bf5b14 100644
--- a/include/openmc/mgxs.h
+++ b/include/openmc/mgxs.h
@@ -40,8 +40,8 @@ class Mgxs {
 
     xt::xtensor<double, 1> kTs;   // temperature in eV (k * T)
     AngleDistributionType scatter_format; // flag for if this is legendre, histogram, or tabular
-    int num_delayed_groups; // number of delayed neutron groups
     int num_groups;     // number of energy groups
+    int num_delayed_groups; // number of delayed neutron groups
     std::vector<XsData> xs; // Cross section data
     // MGXS Incoming Flux Angular grid information
     bool is_isotropic; // used to skip search for angle indices if isotropic
diff --git a/src/tallies/tally_scoring.cpp b/src/tallies/tally_scoring.cpp
index 81f6c504eb..e0cd5d095c 100644
--- a/src/tallies/tally_scoring.cpp
+++ b/src/tallies/tally_scoring.cpp
@@ -27,7 +27,7 @@ namespace openmc {
 //==============================================================================
 
 FilterBinIter::FilterBinIter(const Tally& tally, Particle* p)
-  : tally_{tally}, filter_matches_{p->filter_matches_}
+  : filter_matches_{p->filter_matches_}, tally_{tally}
 {
   // Find all valid bins in each relevant filter if they have not already been
   // found for this event.
@@ -57,7 +57,7 @@ FilterBinIter::FilterBinIter(const Tally& tally, Particle* p)
 
 FilterBinIter::FilterBinIter(const Tally& tally, bool end,
     std::vector<FilterMatch>* particle_filter_matches)
-  : tally_{tally}, filter_matches_{*particle_filter_matches}
+  : filter_matches_{*particle_filter_matches}, tally_{tally}
 {
   // Handle the special case for an iterator that points to the end.
   if (end) {