diff --git a/main/fart.cc b/main/fart.cc
index 49c5c74..05ab7b9 100644
--- a/main/fart.cc
+++ b/main/fart.cc
@@ -38,7 +38,7 @@ int main(int argc, char * argv[])
     const char * server_name = NULL;
     int server_port = 0;
     unsigned char * data = NULL;
-    const char * output_file_name = NULL;
+    const char * output_file_name = "fart.bmp";
 
     static const struct option long_options[] = {
         { "output-file",    required_argument, NULL, 'o' },