diff --git a/kconfigcheck.toml b/kconfigcheck.toml
index 572f203a1..83937ac4c 100644
--- a/kconfigcheck.toml
+++ b/kconfigcheck.toml
@@ -333,7 +333,7 @@ USB_G_SERIAL = "n"
 # enable configfs gadgets
 USB_GADGET = "y" # Required by USB_CONFIGFS_*
 USB_CONFIGFS = "m" # Required by USB_CONFIGFS_*
-USB_F_FS = "y"  # FunctionFS USB support
+USB_F_FS = "m"  # FunctionFS USB support
 USB_CONFIGFS_ACM = "y"  # Serial gadget for debug-shell
 USB_CONFIGFS_MASS_STORAGE = "y"  # Mass storage gadget for debug-shell
 USB_CONFIGFS_NCM = "y"  # USB networking via NCM