diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
index a5bf677a66e2..6b1defdcca05 100644
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -285,7 +285,7 @@ Returns 0 on success and a LIBUSB_ERROR code on
 failure.
 .Pp
 .Ft int
-.Fn libsub_get_active_config_descriptor "libusb_device *dev" "struct libusb_config_descriptor **config"
+.Fn libusb_get_active_config_descriptor "libusb_device *dev" "struct libusb_config_descriptor **config"
 Get the USB configuration descriptor for the active configuration.
 Returns 0 on
 success, LIBUSB_ERROR_NOT_FOUND if the device is in