diff --git a/logger_prefix.go b/logger_prefix.go
index e61dcbd..0dd0c35 100644
--- a/logger_prefix.go
+++ b/logger_prefix.go
@@ -9,7 +9,7 @@ func (l myLogger) Prefix(p ...string) Logger {
 	var buffer strings.Builder
 	buffer.WriteString(l.prefix)
 	for _, prefix := range p {
-		buffer.WriteString(fmt.Sprintf("%s: ", prefix))
+		buffer.WriteString(fmt.Sprintf("%s ", prefix))
 	}
 	logger := myLogger{Writer: l.Writer, ErrWriter: l.ErrWriter, prefix: buffer.String(), data: l.data}
 	return logger
diff --git a/my_logger.go b/my_logger.go
index 5f2eb06..9bc2008 100644
--- a/my_logger.go
+++ b/my_logger.go
@@ -53,7 +53,7 @@ func (l myLogger) log(flag uint8, s ...interface{}) {
 			w = l.Writer
 		}
 	}
-	f := fmt.Sprintf("%s%s msg=%q%s", logPrefix(flag), l.prefix, fmt.Sprint(s...), l.data)
+	f := fmt.Sprintf("%s%s msg=%q%s", l.prefix, logPrefix(flag), fmt.Sprint(s...), l.data)
 	fmt.Fprintln(w, f)
 }
 
@@ -67,7 +67,7 @@ func (l myLogger) logf(flag uint8, format string, s ...interface{}) {
 		}
 	}
 	format = fmt.Sprintf("%%s%%s msg=\"%s\"%s\n", format, l.data)
-	s = append([]interface{}{logPrefix(flag), l.prefix}, s...)
+	s = append([]interface{}{l.prefix, logPrefix(flag)}, s...)
 	fmt.Fprintf(w, format, s...)
 }