diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index f1e5c6b..9a20d63 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -17,11 +17,7 @@
  *  limitations under the License.
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"