diff --git a/ports/unix/mpconfigport.h b/ports/unix/mpconfigport.h
index de5a65ab73..de45a800d3 100644
--- a/ports/unix/mpconfigport.h
+++ b/ports/unix/mpconfigport.h
@@ -82,6 +82,12 @@
 #ifndef MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
 #define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE (1)
 #endif
+#ifndef MICROPY_OPT_LOAD_ATTR_FAST_PATH
+#define MICROPY_OPT_LOAD_ATTR_FAST_PATH (1)
+#endif
+#ifndef MICROPY_OPT_MAP_LOOKUP_CACHE
+#define MICROPY_OPT_MAP_LOOKUP_CACHE (1)
+#endif
 #define MICROPY_MODULE_WEAK_LINKS   (1)
 #define MICROPY_CAN_OVERRIDE_BUILTINS (1)
 #define MICROPY_VFS_POSIX_FILE      (1)
diff --git a/ports/unix/variants/minimal/mpconfigvariant.h b/ports/unix/variants/minimal/mpconfigvariant.h
index e87b5d8ec0..d5eab09546 100644
--- a/ports/unix/variants/minimal/mpconfigvariant.h
+++ b/ports/unix/variants/minimal/mpconfigvariant.h
@@ -56,6 +56,8 @@
 #define MICROPY_STREAMS_NON_BLOCK   (0)
 #define MICROPY_OPT_COMPUTED_GOTO   (0)
 #define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE (0)
+#define MICROPY_OPT_LOAD_ATTR_FAST_PATH (0)
+#define MICROPY_OPT_MAP_LOOKUP_CACHE (0)
 #define MICROPY_CAN_OVERRIDE_BUILTINS (0)
 #define MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG (0)
 #define MICROPY_CPYTHON_COMPAT      (0)