diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 0c6d5a5..fd4a875 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -34,7 +34,7 @@
 #include "mbedtls/ecp.h"
 #endif
 
-#if defined(MBEDTLS_ECDSA_C)
+#if defined(MBEDTLS_ECDSA_C) || defined(MBEDTLS_USE_PSA_CRYPTO)
 #include "mbedtls/ecdsa.h"
 #endif
 
@@ -912,6 +912,8 @@
             type == MBEDTLS_PK_ECDSA );
 }
 
+#if defined(MBEDTLS_ECDSA_C)
+
 /*
  * Simultaneously convert and move raw MPI from the beginning of a buffer
  * to an ASN.1 MPI at the end of the buffer.
@@ -994,11 +996,24 @@
     return( 0 );
 }
 
+#endif
+
 static int pk_opaque_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
                    const unsigned char *hash, size_t hash_len,
                    unsigned char *sig, size_t *sig_len,
                    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
 {
+#if !defined(MBEDTLS_ECDSA_C)
+    ((void) ctx);
+    ((void) md_alg);
+    ((void) hash);
+    ((void) hash_len);
+    ((void) sig);
+    ((void) sig_len);
+    ((void) f_rng);
+    ((void) p_rng);
+    return( PSA_ERROR_NOT_SUPPORTED );
+#else
     const psa_key_handle_t *key = (const psa_key_handle_t *) ctx;
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
     psa_algorithm_t alg = PSA_ALG_ECDSA( mbedtls_psa_translate_md( md_alg ) );
@@ -1029,6 +1044,7 @@
 
     /* transcode it to ASN.1 sequence */
     return( pk_ecdsa_sig_asn1_from_psa( sig, sig_len, buf_len ) );
+#endif
 }
 
 const mbedtls_pk_info_t mbedtls_pk_opaque_info = {