diff --git a/src/rp2_common/hardware_gpio/include/hardware/gpio.h b/src/rp2_common/hardware_gpio/include/hardware/gpio.h
index 4449d50..24b4e5c 100644
--- a/src/rp2_common/hardware_gpio/include/hardware/gpio.h
+++ b/src/rp2_common/hardware_gpio/include/hardware/gpio.h
@@ -10,6 +10,7 @@
 #include "pico.h"
 #include "hardware/structs/sio.h"
 #include "hardware/structs/padsbank0.h"
+#include "hardware/structs/iobank0.h"
 
 #ifdef __cplusplus
 extern "C" {