diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index f6a06a0..d21c13e 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3180,7 +3180,9 @@
     status = psa_sign_internal(key, 1, alg, input, input_length, signature,
                                signature_size, signature_length);
 
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
 exit:
+#endif
     LOCAL_INPUT_FREE(input_external, input);
     LOCAL_OUTPUT_FREE(signature_external, signature);
     return status;
@@ -3236,7 +3238,9 @@
     status = psa_verify_internal(key, 1, alg, input, input_length, signature,
                                  signature_length);
 
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
 exit:
+#endif
     LOCAL_INPUT_FREE(input_external, input);
     LOCAL_INPUT_FREE(signature_external, signature);
 
@@ -3308,7 +3312,9 @@
     status = psa_sign_internal(key, 0, alg, hash, hash_length, signature,
                                signature_size, signature_length);
 
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
 exit:
+#endif
     LOCAL_INPUT_FREE(hash_external, hash);
     LOCAL_OUTPUT_FREE(signature_external, signature);
 
@@ -3378,7 +3384,9 @@
     status = psa_verify_internal(key, 0, alg, hash, hash_length, signature,
                                  signature_length);
 
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
 exit:
+#endif
     LOCAL_INPUT_FREE(hash_external, hash);
     LOCAL_INPUT_FREE(signature_external, signature);