diff --git a/include/openmc/particle.h b/include/openmc/particle.h
index c6156e481d..8ec53de447 100644
--- a/include/openmc/particle.h
+++ b/include/openmc/particle.h
@@ -26,9 +26,6 @@ namespace openmc {
 // use to store the bins for delayed group tallies.
 constexpr int MAX_DELAYED_GROUPS {8};
 
-// Maximum number of secondary particles created
-constexpr int MAX_SECONDARY {1000};
-
 // Maximum number of lost particles
 constexpr int MAX_LOST_PARTICLES {10};