1 files changed, 13 insertions, 2 deletions
diff --git a/py/moduerrno.c b/py/moduerrno.c
index ce8a6bf89..660fca07a 100644
--- a/py/moduerrno.c
+++ b/py/moduerrno.c
@@ -30,8 +30,6 @@
 #include "py/obj.h"
 #include "py/mperrno.h"
 
-#if MICROPY_PY_UERRNO
-
 // This list can be defined per port in mpconfigport.h to tailor it to a
 // specific port's needs.  If it's not defined then we provide a default.
 #ifndef MICROPY_PY_UERRNO_LIST
@@ -61,6 +59,8 @@
 
 #endif
 
+#if MICROPY_PY_UERRNO
+
 #if MICROPY_PY_UERRNO_ERRORCODE
 STATIC const mp_rom_map_elem_t errorcode_table[] = {
     #define X(e) { MP_ROM_INT(MP_ ## e), MP_ROM_QSTR(MP_QSTR_## e) },
@@ -133,4 +133,15 @@ qstr mp_errno_to_str(mp_obj_t errno_val) {
     #endif
 }
 
+#else //MICROPY_PY_UERRNO
+
+qstr mp_errno_to_str(mp_obj_t errno_val) {
+    int v = MP_OBJ_SMALL_INT_VALUE(errno_val);
+    #define X(e) if (v == e) return (MP_QSTR_ ## e);
+    MICROPY_PY_UERRNO_LIST
+    #undef X
+
+    return MP_QSTR_;
+}
+
 #endif //MICROPY_PY_UERRNO