diff --git a/main.cpp b/main.cpp
index b873eb4..ae257ea 100644
--- a/main.cpp
+++ b/main.cpp
@@ -221,7 +221,7 @@ int main()
             pwmTc0.setDutyA(counter);
             pwmTc0.setDutyB(counter-64);
             pwmTc2.setDutyB(counter-128);
-            _usleep(20);
+            _delay_ms(20);
         }
     }