diff --git a/src/Image.cc b/src/Image.cc
index b4ae8dd..300b0d5 100644
--- a/src/Image.cc
+++ b/src/Image.cc
@@ -83,7 +83,7 @@ Image::Image(uint8_t* buf, unsigned len): ObjectWrap() {
 
 
 Image::Image(v8::Value* fileName): ObjectWrap() {
-    filename = std::string(*v8::String::AsciiValue(fileName->ToString()));
+    std::string filename = std::string(*v8::String::AsciiValue(fileName->ToString()));
     mat = cv::imread(filename, -1);
 };    
     
diff --git a/src/Image.h b/src/Image.h
index cc7eb61..7b9222c 100644
--- a/src/Image.h
+++ b/src/Image.h
@@ -2,7 +2,6 @@
 
 class Image: public node::ObjectWrap {
   public:
-      std::string filename;
       cv::Mat mat;
 
       static Persistent<FunctionTemplate> constructor;