diff --git a/library/x509.c b/library/x509.c
index 06e21f2..a80ab53 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -133,7 +133,7 @@
         case MBEDTLS_MD_MD5:
             return "MD5";
 #endif
-#if defined(MBEDTLS_MD_CAN_SHA1)
+#if defined(PSA_WANT_ALG_SHA_1)
         case MBEDTLS_MD_SHA1:
             return "SHA1";
 #endif