diff --git a/apps/traincascade/traincascade.cpp b/apps/traincascade/traincascade.cpp
index 745e3054b5..6c3fc84b3e 100644
--- a/apps/traincascade/traincascade.cpp
+++ b/apps/traincascade/traincascade.cpp
@@ -4,6 +4,11 @@
 using namespace std;
 using namespace cv;
 
+/*
+traincascade.cpp is the source file of the program used for cascade training.
+User has to provide training input in form of posotive and negative training images,
+and other data related to training in form of command line argument.
+*/
 int main( int argc, char* argv[] )
 {
     CvCascadeClassifier classifier;