diff --git a/api.go b/api.go
index 0288c45..c2f7ec4 100644
--- a/api.go
+++ b/api.go
@@ -15,6 +15,7 @@ var (
 	requestLogidGetter    = defaultLogidGetter
 	handlerMapper         = map[string]Handler{}
 	errCodeUnknownError   = -10000
+	errCodeParameterError = -20000
 	errCodeUnimplementApi = -20401
 )
 
@@ -115,4 +116,7 @@ func InitErrCodes(errcodes map[string]int) {
 	if code, ok := errcodes["ErrCodeUnimplementApi"]; ok {
 		errCodeUnknownError = code
 	}
+	if code, ok := errcodes["errCodeParameterError"]; ok {
+		errCodeParameterError = code
+	}
 }
diff --git a/context.go b/context.go
index c495427..c750970 100644
--- a/context.go
+++ b/context.go
@@ -207,5 +207,5 @@ func (c *Context) RESULT_PARAMETER_ERROR(err string) error {
 	if c.resultentry == "" {
 		c.resultentry = "RESULT_PARAMETER_ERROR"
 	}
-	return c.RESULT_ERROR(errCodeUnknownError, err)
+	return c.RESULT_ERROR(errCodeParameterError, err)
 }