diff --git a/usb_modeswitch.changes b/usb_modeswitch.changes
index 8e7c049..764e597 100644
--- a/usb_modeswitch.changes
+++ b/usb_modeswitch.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sat Apr 25 08:17:32 UTC 2015 - coolo@suse.com
+
+- use pkgconfig to detect udev install directory to avoid problems
+  during bootstrap
+
 -------------------------------------------------------------------
 Wed Apr  8 02:18:03 UTC 2015 - p.drouand@gmail.com
 
diff --git a/usb_modeswitch.spec b/usb_modeswitch.spec
index 29512ce..9185cfe 100644
--- a/usb_modeswitch.spec
+++ b/usb_modeswitch.spec
@@ -15,13 +15,6 @@
 # Please submit bugfixes or comments via http://bugs.opensuse.org/
 #
 
-
-%if %( echo `rpm -q --queryformat %%{version} udev` ) > 190
-%define _udevdir /usr/lib/udev/
-%else
-%define _udevdir /lib/udev/
-%endif
-
 Name:           usb_modeswitch
 Version:        2.2.1
 Release:        0
@@ -40,11 +33,13 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  fdupes
 BuildRequires:  pkg-config
 BuildRequires:  tcl
-BuildRequires:  udev
+BuildRequires:  pkgconfig(udev)
 BuildRequires:  pkgconfig(libusb-1.0)
 Requires:       tcl >= 8.4
 Requires:       usb_modeswitch-data = %version
 
+%define _udevdir %(pkg-config --variable=udevdir udev)
+
 %description
 USB_ModeSwitch is a mode switching tool for controlling "flip flop"
 (multiple device) USB gear. It allows so-called "Zero-CD" devices that