diff --git a/boards/sim/sim/sim/src/sim_ioexpander.c b/boards/sim/sim/sim/src/sim_ioexpander.c
index ad71041305d..599ac68743b 100644
--- a/boards/sim/sim/sim/src/sim_ioexpander.c
+++ b/boards/sim/sim/sim/src/sim_ioexpander.c
@@ -73,7 +73,7 @@ int sim_gpio_initialize(void)
   IOEXP_SETDIRECTION(ioe, 1, IOEXPANDER_DIRECTION_OUT);
   IOEXP_SETOPTION(ioe, 1, IOEXPANDER_OPTION_INVERT,
                   (void *)IOEXPANDER_VAL_NORMAL);
-  IOEXP_SETOPTION(ioe, 2, IOEXPANDER_OPTION_INTCFG,
+  IOEXP_SETOPTION(ioe, 1, IOEXPANDER_OPTION_INTCFG,
                   (void *)IOEXPANDER_VAL_DISABLE);
   gpio_lower_half(ioe, 1, GPIO_OUTPUT_PIN, 1);