diff --git a/eic_data.yaml b/eic_data.yaml
index 058eca7fd4b167dedc6141edf78d1b0d8b4cb2bb..6c5e5b4970b073b67e151f78416eb1cb934884d1 100644
--- a/eic_data.yaml
+++ b/eic_data.yaml
@@ -260,7 +260,7 @@ datatypes:
       - eicd::Track       tracks            // Tracks used for this particle
       - eicd::ReconstructedParticle particles // Reconstructed particles that have been combined to this particle
       - eicd::ParticleID  particleIDs       // All associated particle IDs for this particle (not sorted by likelihood)
-    ConstExtraCode:
+    ExtraCode:
       declaration: "
         bool isCompound() const {return particles_size() > 0;}\n
         "