diff --git a/src/Sound4Calc.c b/src/Sound4Calc.c
index 28d858a..bf3df71 100755
--- a/src/Sound4Calc.c
+++ b/src/Sound4Calc.c
@@ -1,7 +1,6 @@
 
 #include "addresses.h"
 #include "Sound4Calc.h"
-#include "syscall.h"
 
 #include <timer.h> // add timer's fonction
 #include <display.h> // add display's fonction