diff --git a/analyse/idf.go b/analyse/idf.go
index f597fec..f4ce055 100644
--- a/analyse/idf.go
+++ b/analyse/idf.go
@@ -18,7 +18,7 @@ func (l *IDFLoader) AddEntry(entry *jiebago.Entry) {
 
 func NewIDFLoader(IDFFileName string) (*IDFLoader, error) {
 	loader := &IDFLoader{make(map[string]float64), 0.0, make([]float64, 0)}
-	err = jiebago.LoadDict(loader, IDFFileName, false)
+	err := jiebago.LoadDict(loader, IDFFileName, false)
 	if err != nil {
 		return nil, err
 	}