diff --git a/algo/cec2020/jDE.go b/algo/cec2020/jDE.go
index 082cf90..79ffdc3 100644
--- a/algo/cec2020/jDE.go
+++ b/algo/cec2020/jDE.go
@@ -405,6 +405,8 @@ func (j *JDE) evolve(pop *Population, uniDist *distuv.Uniform) {
 		for k := 0; k < pop.Dimen; k++ {
 			if crossPoints[k] {
 				trial[k] = currentIndividual.CurX[k]
+			} else {
+				trial[k] = mutant[k]
 			}
 		}