diff --git a/keyboards/custommk/ergostrafer_rgb/info.json b/keyboards/custommk/ergostrafer_rgb/keyboard.json
similarity index 99%
rename from keyboards/custommk/ergostrafer_rgb/info.json
rename to keyboards/custommk/ergostrafer_rgb/keyboard.json
index ac058be1a4..a0b0645e98 100644
--- a/keyboards/custommk/ergostrafer_rgb/info.json
+++ b/keyboards/custommk/ergostrafer_rgb/keyboard.json
@@ -4,6 +4,9 @@
     "maintainer": "customMK",
     "bootloader": "stm32-dfu",
     "diode_direction": "ROW2COL",
+    "audio": {
+        "driver": "pwm_hardware"
+    },
     "dynamic_keymap": {
         "layer_count": 32
     },
diff --git a/keyboards/custommk/ergostrafer_rgb/rules.mk b/keyboards/custommk/ergostrafer_rgb/rules.mk
deleted file mode 100644
index 72f75f4367..0000000000
--- a/keyboards/custommk/ergostrafer_rgb/rules.mk
+++ /dev/null
@@ -1 +0,0 @@
-AUDIO_DRIVER = pwm_hardware