diff --git a/include/openthread/instance.h b/include/openthread/instance.h
index d3ea91e5a..a6427199b 100644
--- a/include/openthread/instance.h
+++ b/include/openthread/instance.h
@@ -53,7 +53,7 @@ extern "C" {
  * @note This number versions both OpenThread platform and user APIs.
  *
  */
-#define OPENTHREAD_API_VERSION (162)
+#define OPENTHREAD_API_VERSION (163)
 
 /**
  * @addtogroup api-instance
diff --git a/include/openthread/platform/crypto.h b/include/openthread/platform/crypto.h
index eb2791ad6..6c0c13490 100644
--- a/include/openthread/platform/crypto.h
+++ b/include/openthread/platform/crypto.h
@@ -40,10 +40,6 @@
 
 #include <openthread/error.h>
 
-#ifdef OT_PLAT_CRYPTO_ATTRIBUTES_TYPE_HEADER
-#include OT_PLAT_CRYPTO_ATTRIBUTES_TYPE_HEADER
-#endif
-
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/src/core/crypto/storage.hpp b/src/core/crypto/storage.hpp
index 0b4c018f5..bb08f7897 100644
--- a/src/core/crypto/storage.hpp
+++ b/src/core/crypto/storage.hpp
@@ -96,12 +96,6 @@ typedef otCryptoKeyRef KeyRef;
 
 constexpr KeyRef kInvalidKeyRef = 0x80000000; ///< Invalid `KeyRef` value (PSA_KEY_ID_VENDOR_MAX + 1).
 
-/**
- * This type represents the Key Attributes structure.
- *
- */
-typedef otCryptoKeyAttributes KeyAttributes;
-
 /**
  * Determine if a given `KeyRef` is valid or not.
  *