diff --git a/rules/gentoo/30-kernel-compat.rules b/rules/gentoo/30-kernel-compat.rules
index d6d44137266..213e218d937 100644
--- a/rules/gentoo/30-kernel-compat.rules
+++ b/rules/gentoo/30-kernel-compat.rules
@@ -2,6 +2,13 @@
 
 ACTION!="add|change", GOTO="kernel_compat_end"
 
+#
+# sysfs timing rules
+#
+
+# needed for kernels <2.6.30
+SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", WAIT_FOR_SYSFS="descriptors"
+
 #
 # naming device rules
 #