diff --git a/edm4hep.yaml b/edm4hep.yaml
index 8cd26e84a..f0efa5eb6 100644
--- a/edm4hep.yaml
+++ b/edm4hep.yaml
@@ -149,8 +149,8 @@ datatypes:
       - double mass                     //mass of the particle in [GeV]
       - edm4hep::Vector3d vertex              //production vertex of the particle in [mm].
       - edm4hep::Vector3d endpoint            //endpoint of the particle in [mm]
-      - edm4hep::Vector3f momentum             //particle 3-momentum at the production vertex in [GeV]
-      - edm4hep::Vector3f momentumAtEndpoint   //particle 3-momentum at the endpoint in [GeV]
+      - edm4hep::Vector3d momentum             //particle 3-momentum at the production vertex in [GeV]
+      - edm4hep::Vector3d momentumAtEndpoint   //particle 3-momentum at the endpoint in [GeV]
       - edm4hep::Vector3f spin                 //spin (helicity) vector of the particle.
       - edm4hep::Vector2i colorFlow                //color flow as defined by the generator
     OneToManyRelations: