diff --git a/config/mbedtls_config.h b/config/mbedtls_config.h
index 0311975..6da7bd8 100644
--- a/config/mbedtls_config.h
+++ b/config/mbedtls_config.h
@@ -330,7 +330,7 @@
 //#define MBEDTLS_RSA_ALT
 //#define MBEDTLS_SHA1_ALT
 #ifdef PICO_RP2350
-#define MBEDTLS_SHA256_ALT
+//#define MBEDTLS_SHA256_ALT
 #endif
 //#define MBEDTLS_SHA512_ALT
 
diff --git a/config/rp2350/alt/sha256_alt.c b/config/rp2350/alt/sha256_alt.c
index 17f5517..82bcd4d 100644
--- a/config/rp2350/alt/sha256_alt.c
+++ b/config/rp2350/alt/sha256_alt.c
@@ -286,3 +286,9 @@ int mbedtls_sha256_finish(mbedtls_sha256_context *ctx, unsigned char *output) {
     }
     return 0;
 }
+
+void mbedtls_sha256_clone(mbedtls_sha256_context *dst,
+                          const mbedtls_sha256_context *src)
+{
+    *dst = *src;
+}
diff --git a/config/rp2350/alt/sha256_alt.h b/config/rp2350/alt/sha256_alt.h
index 0e1ada4..d480ce6 100644
--- a/config/rp2350/alt/sha256_alt.h
+++ b/config/rp2350/alt/sha256_alt.h
@@ -18,7 +18,6 @@
 #ifndef _SHA256_ALT_H_
 #define _SHA256_ALT_H_
 
-#include "pico_keys.h"
 #include "pico/sha256.h"
 
 typedef struct mbedtls_sha256_context {