diff --git a/include/drivers/gpio/gpio_mmio32.h b/include/drivers/gpio/gpio_mmio32.h
index 1b8c431c7ed..9392ab00626 100644
--- a/include/drivers/gpio/gpio_mmio32.h
+++ b/include/drivers/gpio/gpio_mmio32.h
@@ -17,6 +17,8 @@ struct gpio_mmio32_config {
 };
 
 struct gpio_mmio32_context {
+	/* gpio_driver_data needs to be first */
+	struct gpio_driver_data common;
 	const struct gpio_mmio32_config *config;
 	u32_t invert; /* Mask of 'reg' bits that should be inverted */
 };