diff --git a/algo/de/jDE.go b/algo/de/jDE.go
index 7855d75..5d3ed00 100644
--- a/algo/de/jDE.go
+++ b/algo/de/jDE.go
@@ -77,7 +77,7 @@ func (j *JDE) Init(generations, mutStrategy, adptScheme, np int, f, cr float64,
 		jDELogger.Fatalln("Parameter self-adaptation scheme needs to be from the interval <0; 1>, got", adptScheme)
 
 	case np < jDEMinNP:
-		jDELogger.Fatalf("NP needs to be greater than %d, got: %d\n.", jDEMinNP, np)
+		jDELogger.Fatalf("NP cannot be less than %d, got: %d\n.", jDEMinNP, np)
 
 	case f < fMin || f > fMax:
 		jDELogger.Fatalf("F needs to be from the interval <%f;%f>, got: %f\n.", fMin, fMax, f)