diff --git a/src/main.cpp b/src/main.cpp
index 8f8c5a1..74fec1a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -282,7 +282,7 @@ int perfromOperation(int operation, char** fileNames, const Config& config)
 		
 		cv::FileStorage fs(config.curve, cv::FileStorage::READ);
 		cv::Mat curve;
-		fs["curve"]>>curve;
+		fs["cal"]>>curve;
 		if(!curve.data || curve.type() != CV_32FC1 || curve.rows != 2 || curve.cols < 3)
 		{
 			Log(Log::INFO)<<"invalid curve";