diff --git a/include/hardware/boot_control.h b/include/hardware/boot_control.h
index 36a867d..abbf3f1 100644
--- a/include/hardware/boot_control.h
+++ b/include/hardware/boot_control.h
@@ -125,7 +125,14 @@
      */
     int (*isSlotMarkedSuccessful)(struct boot_control_module *module, unsigned slot);
 
-    void* reserved[31];
+    /**
+     * Returns the active slot to boot into on the next boot. If
+     * setActiveBootSlot() has been called, the getter function should return
+     * the same slot as the one provided in the last setActiveBootSlot() call.
+     */
+    unsigned (*getActiveBootSlot)(struct boot_control_module *module);
+
+    void* reserved[30];
 } boot_control_module_t;