diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index c45a1b8..e08a47e 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -573,7 +573,7 @@
     psa_hash_abort( &ssl->handshake->fin_sha384_psa );
     psa_hash_setup( &ssl->handshake->fin_sha384_psa, PSA_ALG_SHA_384 );
 #else
-    mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
+    mbedtls_sha512_starts( &ssl->handshake->fin_sha384, 1 );
 #endif
 #endif
 }
@@ -592,7 +592,7 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len );
 #else
-    mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
+    mbedtls_sha512_update( &ssl->handshake->fin_sha384, buf, len );
 #endif
 #endif
 }
@@ -616,7 +616,7 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len );
 #else
-    mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
+    mbedtls_sha512_update( &ssl->handshake->fin_sha384, buf, len );
 #endif
 }
 #endif
@@ -639,8 +639,8 @@
     handshake->fin_sha384_psa = psa_hash_operation_init();
     psa_hash_setup( &handshake->fin_sha384_psa, PSA_ALG_SHA_384 );
 #else
-    mbedtls_sha512_init(   &handshake->fin_sha512    );
-    mbedtls_sha512_starts( &handshake->fin_sha512, 1 );
+    mbedtls_sha512_init(   &handshake->fin_sha384    );
+    mbedtls_sha512_starts( &handshake->fin_sha384, 1 );
 #endif
 #endif
 
@@ -3510,7 +3510,7 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_hash_abort( &handshake->fin_sha384_psa );
 #else
-    mbedtls_sha512_free(   &handshake->fin_sha512    );
+    mbedtls_sha512_free(   &handshake->fin_sha384    );
 #endif
 #endif
 
@@ -5062,7 +5062,7 @@
         return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
 
     mbedtls_sha512_init( &sha512 );
-    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
+    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha384 );
 
     if( ( ret = mbedtls_sha512_finish( &sha512, dst ) ) != 0 )
     {
@@ -5884,7 +5884,7 @@
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
 
-    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
+    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha384 );
     mbedtls_sha512_finish( &sha512, hash );
 
     *hlen = 48;
@@ -6986,7 +6986,7 @@
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc  finished tls sha384" ) );
 
-    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
+    mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha384 );
 
     /*
      * TLSv1.2: