diff --git a/sf-stream/src/main.cpp b/sf-stream/src/main.cpp
index 8adb1f3..987ee42 100644
--- a/sf-stream/src/main.cpp
+++ b/sf-stream/src/main.cpp
@@ -15,11 +15,9 @@ using namespace stream_config;
 
 int main (int argc, char *argv[])
 {
-    if (argc != 2) {
-        cout << endl;
-        cout << "Usage: sf_stream ";
-        cout << " [detector_json_filename]";
+    if (argc != 1) {
         cout << endl;
+        cout << "Usage: sf_stream [detector_json_filename]" << endl;
         cout << "\tdetector_json_filename: json file with the configuration "
                 "of the detector." << endl;
         cout << endl;