diff --git a/userspace/tee/main.cpp b/userspace/tee/main.cpp
index 31b15cea..bf533e18 100644
--- a/userspace/tee/main.cpp
+++ b/userspace/tee/main.cpp
@@ -9,56 +9,56 @@
 
 int main(int argc, char** argv)
 {
-    int files[MAX_FILES] {};
-    size_t file_count = 0;
+	int files[MAX_FILES] {};
+	size_t file_count = 0;
 
-    int arg = 1;
+	int arg = 1;
 
-    int oflag = O_WRONLY | O_CREAT;
-    if (arg < argc && strcmp(argv[arg], "-a") == 0)
-    {
-        oflag |= O_APPEND;
-        arg++;
-    }
-    else
-    {
-        oflag |= O_TRUNC;
-    }
+	int oflag = O_WRONLY | O_CREAT;
+	if (arg < argc && strcmp(argv[arg], "-a") == 0)
+	{
+		oflag |= O_APPEND;
+		arg++;
+	}
+	else
+	{
+		oflag |= O_TRUNC;
+	}
 
-    for (int i = arg; i < argc; i++)
-    {
-        files[file_count] = open(argv[i], oflag, 0644);
-        if (files[file_count] == -1)
-            perror(argv[i]);
-        else
-            file_count++;
-        
-        if (file_count >= MAX_FILES)
-        {
-            fprintf(stderr, "only up to %d files are supported\n", MAX_FILES);
-            break;
-        }
-    }
+	for (int i = arg; i < argc; i++)
+	{
+		files[file_count] = open(argv[i], oflag, 0644);
+		if (files[file_count] == -1)
+			perror(argv[i]);
+		else
+			file_count++;
+		
+		if (file_count >= MAX_FILES)
+		{
+			fprintf(stderr, "only up to %d files are supported\n", MAX_FILES);
+			break;
+		}
+	}
 
-    char* buffer = (char*)malloc(BUF_SIZE);
-    for (;;)
-    {
-        ssize_t nread = read(STDIN_FILENO, buffer, BUF_SIZE);
-        if (nread == -1)
-            perror("stdin");
-        if (nread <= 0)
-            break;
-        write(STDOUT_FILENO, buffer, nread);
-        for (size_t i = 0; i < file_count; i++)
-            write(files[i], buffer, nread);
-    }
-    free(buffer);
+	char* buffer = (char*)malloc(BUF_SIZE);
+	for (;;)
+	{
+		ssize_t nread = read(STDIN_FILENO, buffer, BUF_SIZE);
+		if (nread == -1)
+			perror("stdin");
+		if (nread <= 0)
+			break;
+		write(STDOUT_FILENO, buffer, nread);
+		for (size_t i = 0; i < file_count; i++)
+			write(files[i], buffer, nread);
+	}
+	free(buffer);
 
-    if (ferror(stdin)) 
-        perror("stdin");
+	if (ferror(stdin)) 
+		perror("stdin");
 
-    for (size_t i = 0; i < file_count; i++)
-        close(files[i]);
+	for (size_t i = 0; i < file_count; i++)
+		close(files[i]);
 
-    return 0;
+	return 0;
 }