diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -216,6 +216,7 @@
 	LIBUSB_SPEED_FULL = 2,
 	LIBUSB_SPEED_HIGH = 3,
 	LIBUSB_SPEED_SUPER = 4,
+	LIBUSB_SPEED_SUPER_PLUS = 5,
 };
 
 enum libusb_transfer_status {
diff --git a/lib/libusb/libusb01.c b/lib/libusb/libusb01.c
--- a/lib/libusb/libusb01.c
+++ b/lib/libusb/libusb01.c
@@ -130,6 +130,8 @@
 		bufsize = 4096;
 	} else if (speed == LIBUSB20_SPEED_SUPER) {
 		bufsize = 65536;
+	} else if (speed == LIBUSB20_SPEED_SUPER_PLUS) {
+		bufsize = 131072;
 	} else {
 		bufsize = 16384;
 	}
diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -451,6 +451,8 @@
 		return (LIBUSB_SPEED_HIGH);
 	case LIBUSB20_SPEED_SUPER:
 		return (LIBUSB_SPEED_SUPER);
+	case LIBUSB20_SPEED_SUPER_PLUS:
+		return (LIBUSB_SPEED_SUPER_PLUS);
 	default:
 		break;
 	}
@@ -1080,6 +1082,9 @@
 		case LIBUSB20_SPEED_SUPER:
 			ret = 65536;
 			break;
+		case LIBUSB20_SPEED_SUPER_PLUS:
+			ret = 131072;
+			break;
 		default:
 			ret = 16384;
 			break;
diff --git a/lib/libusb/libusb20.h b/lib/libusb/libusb20.h
--- a/lib/libusb/libusb20.h
+++ b/lib/libusb/libusb20.h
@@ -159,6 +159,7 @@
 	LIBUSB20_SPEED_HIGH,
 	LIBUSB20_SPEED_VARIABLE,
 	LIBUSB20_SPEED_SUPER,
+	LIBUSB20_SPEED_SUPER_PLUS,
 };
 
 /** \ingroup misc
diff --git a/lib/libusb/libusb20.3 b/lib/libusb/libusb20.3
--- a/lib/libusb/libusb20.3
+++ b/lib/libusb/libusb20.3
@@ -858,6 +858,7 @@
 .It LIBUSB20_SPEED_HIGH
 .It LIBUSB20_SPEED_VARIABLE
 .It LIBUSB20_SPEED_SUPER
+.It LIBUSB20_SPEED_SUPER_PLUS
 .El
 .
 .Pp
diff --git a/usr.sbin/usbconfig/dump.c b/usr.sbin/usbconfig/dump.c
--- a/usr.sbin/usbconfig/dump.c
+++ b/usr.sbin/usbconfig/dump.c
@@ -100,6 +100,8 @@
 		return ("VARIABLE (52-480Mbps)");
 	case LIBUSB20_SPEED_SUPER:
 		return ("SUPER (5.0Gbps)");
+	case LIBUSB20_SPEED_SUPER_PLUS:
+		return ("SUPER+(10-20Gbps)");
 	default:
 		break;
 	}