diff --git a/Qt/sim-test.cpp b/Qt/sim-test.cpp
index e9ebbc6..0e311ba 100644
--- a/Qt/sim-test.cpp
+++ b/Qt/sim-test.cpp
@@ -26,7 +26,6 @@ Test_Sim::Test_Sim(Web_socket_wrapper* web_socket, QWidget* parent) :
     setup_buttons();
     setup_comboboxes();
     setup_sliders();
-    setup_sliders();
 }
 
 Test_Sim::~Test_Sim() {