diff --git a/libfic/team_my.go b/libfic/team_my.go
index f516df7f..294ead6f 100644
--- a/libfic/team_my.go
+++ b/libfic/team_my.go
@@ -155,7 +155,7 @@ func MyJSONTeam(t *Team, started bool) (interface{}, error) {
 					if gain, err := e.EstimateGain(t, stime != nil); err == nil {
 						exercice.Gain = int(gain * GlobalScoreCoefficient)
 					} else {
-						log.Println("ERROR during gain estimation:", err)
+						log.Printf("ERROR during gain estimation (tid=%d ; eid=%d): %s", t.Id, e.Id, err.Error())
 					}
 				}