diff --git a/Stack/History/SecondaryParticle.hpp b/Stack/History/SecondaryParticle.hpp
index f1a2831d82fe8c7a1071116096b55e766488b71f..b6db7e8fd04684ff9a39285fe15e2b228ea74835 100644
--- a/Stack/History/SecondaryParticle.hpp
+++ b/Stack/History/SecondaryParticle.hpp
@@ -18,7 +18,7 @@ namespace corsika::history {
 
   /**
    * This class stores the non-common properties of secondaries in an event. All
-   * other (common) properties are available via the event itself.
+   * other (common) properties are available via the event itself or its projectile.
    */
   class SecondaryParticle {
     units::si::HEPEnergyType const energy_;