diff --git a/examples/bluetooth/nimble/bleprph_wifi_coex/sdkconfig.defaults b/examples/bluetooth/nimble/bleprph_wifi_coex/sdkconfig.defaults
index 34b0da90ff..31e8fcc48a 100644
--- a/examples/bluetooth/nimble/bleprph_wifi_coex/sdkconfig.defaults
+++ b/examples/bluetooth/nimble/bleprph_wifi_coex/sdkconfig.defaults
@@ -9,3 +9,6 @@ CONFIG_BTDM_CTRL_MODE_BTDM=n
 CONFIG_BT_BLUEDROID_ENABLED=n
 CONFIG_BT_NIMBLE_ENABLED=y
 CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y
+
+# WiFi config
+CONFIG_ESP_WIFI_IRAM_OPT=n