diff --git a/programs/fuzz/onefile.c b/programs/fuzz/onefile.c
index 2d4330a..6c02a64 100644
--- a/programs/fuzz/onefile.c
+++ b/programs/fuzz/onefile.c
@@ -1,3 +1,5 @@
+#define MBEDTLS_DECLARE_PRIVATE_IDENTIFIERS
+
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>