diff --git a/Readme.md b/Readme.md
index 68ef1f7..109943d 100644
--- a/Readme.md
+++ b/Readme.md
@@ -5,6 +5,7 @@
 - better error reporting..for example ls_dir on non existing dir should prind `pwd` dir
 
 ### TODO
+- add debug support, at least function call could keep call stack
 - documentation
 - add url of source/inspiration to clib/*.cpp
 - add stdtest - to test every functionality
@@ -12,7 +13,6 @@
 - add -sb option to remove sheebang line
 - add instrumentation (time, nr of evals, num of atoms, debug info, debug environment etc)
     - add -p (profile/performance option)
-- add debug support function call could keep call stack
 - multiline editting (kilo editor)
 - execute system command should capture stderr
 - add built in for and, or
diff --git a/ml.cpp b/ml.cpp
index 030fec8..fb2e8af 100644
--- a/ml.cpp
+++ b/ml.cpp
@@ -1886,6 +1886,12 @@ int main(int argc, char *argv[]) {
 			std::vector<std::string> files = getCmdOption(argv, argc, "-f");
 	    	for (size_t i = 0; i < files.size(); i++)
 				run(read_file_contents(files[i]), env);
+		// just one parameter - filename
+		} else if (argc == 2) {
+			std::string file_content = read_file_contents(argv[1]);
+			if (file_content.find("#!") == 0)	// shebang ?
+				file_content.erase(0, file_content.find("\n") + 1);		// TODO mac osx newline??
+			run(file_content, env);
 		// repl
 		} else {
 			repl(env);