diff --git a/include/plugin-api.h b/include/plugin-api.h
index 673f136ce68..5a45ce773f7 100644
--- a/include/plugin-api.h
+++ b/include/plugin-api.h
@@ -89,16 +89,18 @@ struct ld_plugin_symbol
   char *version;
   /* This is for compatibility with older ABIs.  The older ABI defined
      only 'def' field.  */
-#ifdef __BIG_ENDIAN__
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
   char unused;
   char section_kind;
   char symbol_type;
   char def;
-#else
+#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
   char def;
   char symbol_type;
   char section_kind;
   char unused;
+#else
+#error "Could not detect architecture endianess"
 #endif
   int visibility;
   uint64_t size;