diff --git a/platforms/common/include/px4_platform_common/crypto_backend.h b/platforms/common/include/px4_platform_common/crypto_backend.h
index 5fdd6a548b3f..da7d4998284f 100644
--- a/platforms/common/include/px4_platform_common/crypto_backend.h
+++ b/platforms/common/include/px4_platform_common/crypto_backend.h
@@ -82,6 +82,17 @@ size_t keystore_get_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *
  */
 bool keystore_put_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key, size_t key_size);
 
+/*
+ * Modify a key in keystore
+ * handle: a handle to an open keystore
+ * idx: key index in keystore
+ * key_buf: work buffer for the key
+ * key_buf_size: size of the provided work buffer
+ * cb: callback function to perform the modification of the key
+ * arg: pointer to callback custom argument
+ */
+bool keystore_modify_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key_buf, size_t key_buf_size,
+			 keystore_callback_t cb, void *arg);
 
 /*
  * Architecture specific PX4 Crypto API functions
diff --git a/src/drivers/stub_keystore/keystore_backend_definitions.h b/src/drivers/stub_keystore/keystore_backend_definitions.h
index 3e990cd71f40..95049c588b6f 100644
--- a/src/drivers/stub_keystore/keystore_backend_definitions.h
+++ b/src/drivers/stub_keystore/keystore_backend_definitions.h
@@ -33,6 +33,11 @@
 
 #pragma once
 
+#include <inttypes.h>
+
+/* callback function definition for modify key */
+typedef bool (*keystore_callback_t)(uint8_t idx, uint8_t *key, size_t key_size, void* arg);
+
 typedef struct {
 	int handle;
 } keystore_session_handle_t;
diff --git a/src/drivers/stub_keystore/stub_keystore.c b/src/drivers/stub_keystore/stub_keystore.c
index 1e5054021ad3..212b020073c0 100644
--- a/src/drivers/stub_keystore/stub_keystore.c
+++ b/src/drivers/stub_keystore/stub_keystore.c
@@ -86,3 +86,9 @@ bool keystore_put_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *ke
 {
 	return false;
 }
+
+bool keystore_modify_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key_buf, size_t key_buf_size,
+			 keystore_callback_t cb, void *arg)
+{
+	return false;
+}