diff --git a/src/simulation.cpp b/src/simulation.cpp
index c3d1c17b4..50bf12521 100644
--- a/src/simulation.cpp
+++ b/src/simulation.cpp
@@ -565,4 +565,10 @@ extern "C" void k_generation_clear() { simulation::k_generation.clear(); }
 extern "C" void k_generation_reserve(int i) { simulation::k_generation.reserve(i); }
 extern "C" int64_t work_index(int rank) { return simulation::work_index[rank]; }
 
+// This function was moved here to get around a bug on macOS whereby an invalid
+// pointer is returned for the threadprivate filter_matches
+extern "C" FilterMatch* filter_match_pointer(int indx) {
+  return &simulation::filter_matches[indx];
+}
+
 } // namespace openmc
diff --git a/src/tallies/filter.cpp b/src/tallies/filter.cpp
index 7cf54165d..fd5e38f7e 100644
--- a/src/tallies/filter.cpp
+++ b/src/tallies/filter.cpp
@@ -63,8 +63,7 @@ free_memory_tally_c()
 //==============================================================================
 
 extern "C" {
-  FilterMatch* filter_match_pointer(int indx)
-  {return &simulation::filter_matches[indx];}
+  // filter_match_point moved to simulation.cpp
 
   void
   filter_match_bins_push_back(FilterMatch* match, int val)