diff --git a/bladeRF.changes b/bladeRF.changes
index 3a5a747..6b84337 100644
--- a/bladeRF.changes
+++ b/bladeRF.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Apr 23 19:27:32 UTC 2017 - mardnh@gmx.de
+
+- Update group handling
+
 -------------------------------------------------------------------
 Thu Apr 20 11:46:42 UTC 2017 - mpluskal@suse.com
 
diff --git a/bladeRF.spec b/bladeRF.spec
index 79d5e85..03f660e 100644
--- a/bladeRF.spec
+++ b/bladeRF.spec
@@ -57,6 +57,7 @@ Library for bladeRF, SDR transceiver.
 %package udev
 Summary:        Udev rules for bladeRF
 Group:          Hardware/Other
+Requires(pre):  shadow
 
 %description udev
 Udev rules for bladeRF
@@ -91,11 +92,12 @@ make %{?_smp_mflags}
 cd host
 %cmake_install
 
-%pre
-getent group %{bladerf_group} >/dev/null || groupadd -r %{bladerf_group} 
-
 %post -n %{libname} -p /sbin/ldconfig
 %postun  -n %{libname} -p /sbin/ldconfig
+
+%pre udev
+getent group %{bladerf_group} >/dev/null || groupadd -r %{bladerf_group} 
+
 %post udev
 %udev_rules_update