diff --git a/ports/esp8266/mpconfigport.h b/ports/esp8266/mpconfigport.h
index 97b3090867..a5b149d803 100644
--- a/ports/esp8266/mpconfigport.h
+++ b/ports/esp8266/mpconfigport.h
@@ -69,6 +69,7 @@
 #define MICROPY_PY_UCTYPES          (1)
 #define MICROPY_PY_UHASHLIB         (1)
 #define MICROPY_PY_UHASHLIB_SHA1    (MICROPY_PY_USSL && MICROPY_SSL_AXTLS)
+#define MICROPY_PY_UCRYPTOLIB       (1)
 #define MICROPY_PY_UHEAPQ           (1)
 #define MICROPY_PY_UTIMEQ           (1)
 #define MICROPY_PY_UJSON            (1)
diff --git a/ports/esp8266/mpconfigport_512k.h b/ports/esp8266/mpconfigport_512k.h
index dc97efd35d..60c14883ef 100644
--- a/ports/esp8266/mpconfigport_512k.h
+++ b/ports/esp8266/mpconfigport_512k.h
@@ -32,6 +32,9 @@
 #undef MICROPY_PY_FRAMEBUF
 #define MICROPY_PY_FRAMEBUF             (0)
 
+#undef MICROPY_PY_UCRYPTOLIB
+#define MICROPY_PY_UCRYPTOLIB           (0)
+
 #undef mp_import_stat
 #undef mp_builtin_open
 #undef mp_builtin_open_obj