diff --git a/library/psa_util_internal.h b/library/psa_util_internal.h
index 18bdc9e..4a36dbf 100644
--- a/library/psa_util_internal.h
+++ b/library/psa_util_internal.h
@@ -73,7 +73,7 @@
 #endif
 
 #if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) ||    \
-    defined(MBEDTLS_PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_LEGACY)
+    defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC)
 extern const mbedtls_error_pair_t psa_to_pk_rsa_errors[8];
 #endif