diff --git a/include/drivers/auth/auth_mod.h b/include/drivers/auth/auth_mod.h
index d1fd52c..94537f6 100644
--- a/include/drivers/auth/auth_mod.h
+++ b/include/drivers/auth/auth_mod.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,8 +7,6 @@
 #ifndef AUTH_MOD_H
 #define AUTH_MOD_H
 
-#if TRUSTED_BOARD_BOOT
-
 #include <common/tbbr/cot_def.h>
 #include <common/tbbr/tbbr_img_def.h>
 #include <drivers/auth/auth_common.h>
@@ -46,7 +44,13 @@
 #endif /* COT_DESC_IN_DTB && !IMAGE_BL1 */
 
 /* Public functions */
+#if TRUSTED_BOARD_BOOT
 void auth_mod_init(void);
+#else
+static inline void auth_mod_init(void)
+{
+}
+#endif /* TRUSTED_BOARD_BOOT */
 int auth_mod_get_parent_id(unsigned int img_id, unsigned int *parent_id);
 int auth_mod_verify_img(unsigned int img_id,
 			void *img_ptr,
@@ -85,6 +89,4 @@
 
 #endif
 
-#endif /* TRUSTED_BOARD_BOOT */
-
 #endif /* AUTH_MOD_H */
diff --git a/include/drivers/auth/crypto_mod.h b/include/drivers/auth/crypto_mod.h
index cdcf504..73b2b99 100644
--- a/include/drivers/auth/crypto_mod.h
+++ b/include/drivers/auth/crypto_mod.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2021, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -76,7 +76,14 @@
 } crypto_lib_desc_t;
 
 /* Public functions */
+#if CRYPTO_SUPPORT
 void crypto_mod_init(void);
+#else
+static inline void crypto_mod_init(void)
+{
+}
+#endif /* CRYPTO_SUPPORT */
+
 int crypto_mod_verify_signature(void *data_ptr, unsigned int data_len,
 				void *sig_ptr, unsigned int sig_len,
 				void *sig_alg_ptr, unsigned int sig_alg_len,
@@ -93,7 +100,9 @@
 int crypto_mod_calc_hash(enum crypto_md_algo alg, void *data_ptr,
 			 unsigned int data_len,
 			 unsigned char output[CRYPTO_MD_MAX_SIZE]);
+#endif /* MEASURED_BOOT */
 
+#if MEASURED_BOOT && TRUSTED_BOARD_BOOT
 /* Macro to register a cryptographic library */
 #define REGISTER_CRYPTO_LIB(_name, _init, _verify_signature, _verify_hash, \
 			    _calc_hash, _auth_decrypt) \
@@ -105,7 +114,7 @@
 		.calc_hash = _calc_hash, \
 		.auth_decrypt = _auth_decrypt \
 	}
-#else
+#elif TRUSTED_BOARD_BOOT
 #define REGISTER_CRYPTO_LIB(_name, _init, _verify_signature, _verify_hash, \
 			    _auth_decrypt) \
 	const crypto_lib_desc_t crypto_lib_desc = { \
@@ -115,7 +124,14 @@
 		.verify_hash = _verify_hash, \
 		.auth_decrypt = _auth_decrypt \
 	}
-#endif	/* MEASURED_BOOT */
+#elif MEASURED_BOOT
+#define REGISTER_CRYPTO_LIB(_name, _init, _calc_hash) \
+	const crypto_lib_desc_t crypto_lib_desc = { \
+		.name = _name, \
+		.init = _init, \
+		.calc_hash = _calc_hash, \
+	}
+#endif	/* MEASURED_BOOT && TRUSTED_BOARD_BOOT */
 
 extern const crypto_lib_desc_t crypto_lib_desc;