diff --git a/ports/rp2/mpconfigport.h b/ports/rp2/mpconfigport.h
index b349e0d67b..1cc9b96160 100644
--- a/ports/rp2/mpconfigport.h
+++ b/ports/rp2/mpconfigport.h
@@ -98,6 +98,7 @@
 #define MICROPY_PY_OS_INCLUDEFILE               "ports/rp2/modos.c"
 #ifndef MICROPY_PY_OS_DUPTERM
 #define MICROPY_PY_OS_DUPTERM                   (1)
+#define MICROPY_PY_OS_DUPTERM_NOTIFY            (1)
 #endif
 #define MICROPY_PY_OS_SYNC                      (1)
 #define MICROPY_PY_OS_UNAME                     (1)