diff --git a/kconfigcheck.toml b/kconfigcheck.toml
index 93b62356a..572f203a1 100644
--- a/kconfigcheck.toml
+++ b/kconfigcheck.toml
@@ -333,10 +333,12 @@ 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_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
 USB_CONFIGFS_RNDIS = "y"  # USB networking via RNDIS (legacy)
+USB_CONFIGFS_F_FS = "y"  # FunctionFS support in ConfigFS
 
 # community_various: Various options that were not categorized properly due to
 # inflexibility of previous kconfigcheck related code. We should move these to