diff --git a/bdk/ianos/ianos.c b/bdk/ianos/ianos.c
index f2ff2db..8deca45 100644
--- a/bdk/ianos/ianos.c
+++ b/bdk/ianos/ianos.c
@@ -45,6 +45,7 @@ static void _ianos_call_ep(moduleEntrypoint_t entrypoint, void *moduleConfig)
 	bdkParameters->sharedHeap = &_heap;
 
 	// Extra functions.
+	bdkParameters->extension_magic = IANOS_EXT0;
 	bdkParameters->reg_voltage_set = (reg_voltage_set_t)&max7762x_regulator_set_voltage;
 
 	entrypoint(moduleConfig, bdkParameters);
diff --git a/bdk/module.h b/bdk/module.h
index 665164b..acc048c 100644
--- a/bdk/module.h
+++ b/bdk/module.h
@@ -21,6 +21,8 @@
 #include <stddef.h>
 #include <mem/heap.h>
 
+#define IANOS_EXT0 0x304E4149
+
 // Module Callback
 typedef void (*cbMainModule_t)(const char *s);
 typedef void (*memcpy_t)(void *, void *, size_t);
@@ -34,6 +36,7 @@ typedef struct _bdkParams_t
 	heap_t *sharedHeap;
 	memcpy_t memcpy;
 	memset_t memset;
+	u32 extension_magic;
 	reg_voltage_set_t reg_voltage_set;
 } *bdkParams_t;