diff --git a/ports/esp32/mpconfigport.h b/ports/esp32/mpconfigport.h
index b36bd2ebc9..c7a87e3afe 100644
--- a/ports/esp32/mpconfigport.h
+++ b/ports/esp32/mpconfigport.h
@@ -70,6 +70,7 @@
 #define MICROPY_PY_BUILTINS_FROZENSET       (1)
 #define MICROPY_PY_BUILTINS_PROPERTY        (1)
 #define MICROPY_PY_BUILTINS_RANGE_ATTRS     (1)
+#define MICROPY_PY_BUILTINS_ROUND_INT       (1)
 #define MICROPY_PY_BUILTINS_TIMEOUTERROR    (1)
 #define MICROPY_PY_ALL_SPECIAL_METHODS      (1)
 #define MICROPY_PY_BUILTINS_COMPILE         (1)
diff --git a/ports/esp8266/mpconfigport.h b/ports/esp8266/mpconfigport.h
index ec347dae08..f29dbe5c02 100644
--- a/ports/esp8266/mpconfigport.h
+++ b/ports/esp8266/mpconfigport.h
@@ -40,6 +40,7 @@
 #define MICROPY_PY_BUILTINS_SLICE   (1)
 #define MICROPY_PY_BUILTINS_SLICE_ATTRS (1)
 #define MICROPY_PY_BUILTINS_PROPERTY (1)
+#define MICROPY_PY_BUILTINS_ROUND_INT (1)
 #define MICROPY_PY_BUILTINS_INPUT   (1)
 #define MICROPY_PY_BUILTINS_HELP    (1)
 #define MICROPY_PY_BUILTINS_HELP_TEXT esp_help_text
diff --git a/ports/stm32/mpconfigport.h b/ports/stm32/mpconfigport.h
index 115006367c..84e4892976 100644
--- a/ports/stm32/mpconfigport.h
+++ b/ports/stm32/mpconfigport.h
@@ -87,6 +87,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
 #define MICROPY_PY_BUILTINS_FROZENSET (1)
 #define MICROPY_PY_BUILTINS_SLICE_ATTRS (1)
+#define MICROPY_PY_BUILTINS_ROUND_INT (1)
 #define MICROPY_PY_ALL_SPECIAL_METHODS (1)
 #define MICROPY_PY_BUILTINS_COMPILE (1)
 #define MICROPY_PY_BUILTINS_EXECFILE (1)
diff --git a/ports/unix/mpconfigport.h b/ports/unix/mpconfigport.h
index 06dae9da83..f0e17ccad0 100644
--- a/ports/unix/mpconfigport.h
+++ b/ports/unix/mpconfigport.h
@@ -83,6 +83,7 @@
 #define MICROPY_PY_BUILTINS_NOTIMPLEMENTED (1)
 #define MICROPY_PY_BUILTINS_INPUT   (1)
 #define MICROPY_PY_BUILTINS_POW3    (1)
+#define MICROPY_PY_BUILTINS_ROUND_INT    (1)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_ALL_SPECIAL_METHODS (1)
 #define MICROPY_PY_REVERSE_SPECIAL_METHODS (1)