diff --git a/pio/squarewave/generated/squarewave.pio.h b/pio/squarewave/generated/squarewave.pio.h
index 627cb52..9ec7ea6 100644
--- a/pio/squarewave/generated/squarewave.pio.h
+++ b/pio/squarewave/generated/squarewave.pio.h
@@ -2,6 +2,8 @@
 // This file is autogenerated by pioasm; do not edit! //
 // -------------------------------------------------- //
 
+#pragma once
+
 #if !PICO_NO_HARDWARE
 #include "hardware/pio.h"
 #endif
diff --git a/pio/squarewave/generated/squarewave_wrap.pio.h b/pio/squarewave/generated/squarewave_wrap.pio.h
index c1708ec..ff90703 100644
--- a/pio/squarewave/generated/squarewave_wrap.pio.h
+++ b/pio/squarewave/generated/squarewave_wrap.pio.h
@@ -2,6 +2,8 @@
 // This file is autogenerated by pioasm; do not edit! //
 // -------------------------------------------------- //
 
+#pragma once
+
 #if !PICO_NO_HARDWARE
 #include "hardware/pio.h"
 #endif
diff --git a/pio/ws2812/generated/ws2812.pio.h b/pio/ws2812/generated/ws2812.pio.h
index ca40fc5..8cbeea6 100644
--- a/pio/ws2812/generated/ws2812.pio.h
+++ b/pio/ws2812/generated/ws2812.pio.h
@@ -2,6 +2,8 @@
 // This file is autogenerated by pioasm; do not edit! //
 // -------------------------------------------------- //
 
+#pragma once
+
 #if !PICO_NO_HARDWARE
 #include "hardware/pio.h"
 #endif