diff --git a/maca_trans_parser/src/feat_model.c b/maca_trans_parser/src/feat_model.c
index 9ee83b2a409cdce93e224528d7a7644680fe5fd9..9772058c2f778dd28c40498a2fe37f9c431ef593 100644
--- a/maca_trans_parser/src/feat_model.c
+++ b/maca_trans_parser/src/feat_model.c
@@ -143,6 +143,7 @@ int feat_model_get_feat_value_cff(feat_model *fm, config *c, dico *dico_features
   fm->string[0] = '\0';
   for(i=0; i < fd->nbelem; i++){
     strcat(fm->string, fd->array[i]->name);
+    strcat(fm->string, "==");
     feat_val = fd->array[i]->fct(c);
     catenate_int(fm->string, feat_val);
   }