diff --git a/src/hydro/Gadget2/hydro_part.h b/src/hydro/Gadget2/hydro_part.h
index f0139b97492a060abb7edfc0014bdef55211ccbd..1624d99907a0a3a64efc78ea3ab3797731f3c9a3 100644
--- a/src/hydro/Gadget2/hydro_part.h
+++ b/src/hydro/Gadget2/hydro_part.h
@@ -97,11 +97,6 @@ struct part {
 
   /* Signal velocity */
   float v_sig;
-
-  /* temp */
-  struct {
-  float h_dt;  //MATTHIEU
-  } force;
   
   /* Particle ID. */
   unsigned long long id;