diff --git a/Semaine 1/Ultrasonic/tb_ultrasonic_fpga.v b/Semaine 1/Ultrasonic/tb_ultrasonic_fpga.v
index bea169f..b2382b6 100644
--- a/Semaine 1/Ultrasonic/tb_ultrasonic_fpga.v	
+++ b/Semaine 1/Ultrasonic/tb_ultrasonic_fpga.v	
@@ -11,7 +11,7 @@ module tb_ultrasonic_fpga;
 
     time t_start, t_end;
 
-    // Clock 27MHz => periode = 37.037ns
+    // Clock 27MHz => periode = 37ns
     always #18 clk = ~clk;
 
     ultrasonic_fpga uut (