diff --git a/ports/espressif/boards/m5stack_cardputer/pins.c b/ports/espressif/boards/m5stack_cardputer/pins.c
index b0c4c60426..4ee10f8131 100644
--- a/ports/espressif/boards/m5stack_cardputer/pins.c
+++ b/ports/espressif/boards/m5stack_cardputer/pins.c
@@ -30,7 +30,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
 
     // Speaker
     { MP_ROM_QSTR(MP_QSTR_I2S_BIT_CLOCK), MP_ROM_PTR(&pin_GPIO41) },
-    { MP_ROM_QSTR(MP_QSTR_IS2_DATA), MP_ROM_PTR(&pin_GPIO42) },
+    { MP_ROM_QSTR(MP_QSTR_I2S_DATA), MP_ROM_PTR(&pin_GPIO42) },
     { MP_ROM_QSTR(MP_QSTR_I2S_WORD_SELECT), MP_ROM_PTR(&pin_GPIO43) },
 
     // Mic