diff --git a/include/mbedtls/bignum.h b/include/mbedtls/bignum.h
index 74deecf..5187d86 100644
--- a/include/mbedtls/bignum.h
+++ b/include/mbedtls/bignum.h
@@ -23,11 +23,7 @@
 #define MBEDTLS_BIGNUM_H
 #include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>