diff --git a/nx/include/switch/crypto/aes.h b/nx/include/switch/crypto/aes.h
index bd162cf8..adddfb89 100644
--- a/nx/include/switch/crypto/aes.h
+++ b/nx/include/switch/crypto/aes.h
@@ -6,16 +6,36 @@
 #pragma once
 #include "../types.h"
 
+#ifndef AES_BLOCK_SIZE
 #define AES_BLOCK_SIZE 0x10
+#endif
+#ifndef AES_128_KEY_SIZE
 #define AES_128_KEY_SIZE   0x10
+#endif
+#ifndef AES_128_U32_PER_KEY
 #define AES_128_U32_PER_KEY (AES_128_KEY_SIZE / sizeof(u32))
+#endif
+#ifndef AES_128_NUM_ROUNDS
 #define AES_128_NUM_ROUNDS 10
+#endif
+#ifndef AES_192_KEY_SIZE
 #define AES_192_KEY_SIZE   0x18
+#endif
+#ifndef AES_192_U32_PER_KEY
 #define AES_192_U32_PER_KEY (AES_192_KEY_SIZE / sizeof(u32))
+#endif
+#ifndef AES_192_NUM_ROUNDS
 #define AES_192_NUM_ROUNDS 12
+#endif
+#ifndef AES_256_KEY_SIZE
 #define AES_256_KEY_SIZE   0x20
+#endif
+#ifndef AES_256_U32_PER_KEY
 #define AES_256_U32_PER_KEY (AES_256_KEY_SIZE / sizeof(u32))
+#endif
+#ifndef AES_256_NUM_ROUNDS
 #define AES_256_NUM_ROUNDS 14
+#endif
 
 /// Context for AES-128 operations.
 typedef struct {
diff --git a/nx/include/switch/crypto/hmac.h b/nx/include/switch/crypto/hmac.h
index fdf7364e..45ee662b 100644
--- a/nx/include/switch/crypto/hmac.h
+++ b/nx/include/switch/crypto/hmac.h
@@ -23,8 +23,12 @@ typedef struct {
     bool finalized;
 } HmacSha256Context;
 
+#ifndef HMAC_SHA1_KEY_MAX
 #define HMAC_SHA1_KEY_MAX   (sizeof(((HmacSha1Context *)NULL)->key))
+#endif
+#ifndef HMAC_SHA256_KEY_MAX
 #define HMAC_SHA256_KEY_MAX (sizeof(((HmacSha256Context *)NULL)->key))
+#endif
 
 /// Initialize a HMAC-SHA256 context.
 void hmacSha256ContextCreate(HmacSha256Context *out, const void *key, size_t key_size);
diff --git a/nx/include/switch/crypto/sha1.h b/nx/include/switch/crypto/sha1.h
index f9075729..7bb6437f 100644
--- a/nx/include/switch/crypto/sha1.h
+++ b/nx/include/switch/crypto/sha1.h
@@ -6,8 +6,13 @@
 #pragma once
 #include "../types.h"
 
+#ifndef SHA1_HASH_SIZE
 #define SHA1_HASH_SIZE 0x14
+#endif
+
+#ifndef SHA1_BLOCK_SIZE
 #define SHA1_BLOCK_SIZE 0x40
+#endif
 
 /// Context for SHA1 operations.
 typedef struct {
diff --git a/nx/include/switch/crypto/sha256.h b/nx/include/switch/crypto/sha256.h
index bb6e5391..603d221e 100644
--- a/nx/include/switch/crypto/sha256.h
+++ b/nx/include/switch/crypto/sha256.h
@@ -6,8 +6,14 @@
 #pragma once
 #include "../types.h"
 
+
+#ifndef SHA256_HASH_SIZE
 #define SHA256_HASH_SIZE 0x20
+#endif
+
+#ifndef SHA256_BLOCK_SIZE
 #define SHA256_BLOCK_SIZE 0x40
+#endif
 
 /// Context for SHA256 operations.
 typedef struct {