diff --git a/lib/runtime-c-api/src/lib.rs b/lib/runtime-c-api/src/lib.rs
index 52a80f3fc..51f23517c 100644
--- a/lib/runtime-c-api/src/lib.rs
+++ b/lib/runtime-c-api/src/lib.rs
@@ -118,6 +118,6 @@ pub struct wasmer_limit_option_t {
 
 #[repr(C)]
 pub struct wasmer_byte_array {
-    pub bytes: *const u8,
-    pub bytes_len: u32,
+    bytes: *const u8,
+    bytes_len: u32,
 }