diff --git a/openobex.spec b/openobex.spec
index 706897f..cda9403 100644
--- a/openobex.spec
+++ b/openobex.spec
@@ -1,7 +1,7 @@
 Name:          openobex
 Epoch:         1
 Version:       1.7.2
-Release:       1mamba
+Release:       2mamba
 Summary:       Applications for using OBEX
 Group:         Applications/Communication
 Vendor:        openmamba
@@ -13,8 +13,9 @@ Source:        http://downloads.sourceforge.net/openobex/openobex-%{version}-Sou
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
+BuildRequires: ldconfig
 BuildRequires: libbluetooth-devel
-BuildRequires: libusbx-devel
+BuildRequires: libusb-devel
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-buildroot
@@ -35,6 +36,7 @@ This package contains utility programs made to show Open OBEX library usage.
 %package -n lib%{name}
 Group:         System/Libraries
 Summary:       Library for using OBEX
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description -n lib%{name}
 OBEX is a session protocol and can best be described as a binary HTTP protocol.
@@ -65,9 +67,12 @@ Microsoft Windows2000 has also builtin OBEX support.
 
 This package contains static libraries and header files need for development.
 
+%debug_package
+
 %prep
 %setup -q -n openobex-%{version}-Source
-
+sed -i 's|GROUP="plugdev"|GROUP="nopermfs"|' udev/openobex.rules.in
+  
 %build
 %cmake -d build
 
@@ -98,6 +103,8 @@ install -m644 build/apps/lib/libopenobex-apps-common.a %{buildroot}%{_libdir}/li
 %{_bindir}/obex_find
 %{_bindir}/obex_tcp
 %{_bindir}/obex_test
+%{_sbindir}/obex-check-device
+%{_libdir}/lib%{name}.so.*
 %{_mandir}/man1/ircp.1*
 %{_mandir}/man1/irobex_palm3.1*
 %{_mandir}/man1/irxfer.1*
@@ -107,9 +114,7 @@ install -m644 build/apps/lib/libopenobex-apps-common.a %{buildroot}%{_libdir}/li
 
 %files -n lib%{name}
 %defattr(-,root,root)
-%{_sbindir}/obex-check-device
-%{_libdir}/lib%{name}.so.*
-/lib/udev/rules.d/60-openobex.rules
+%{_udevrulesdir}/60-openobex.rules
 %doc COPYING COPYING.LIB
 
 %files -n lib%{name}-devel
@@ -125,6 +130,9 @@ install -m644 build/apps/lib/libopenobex-apps-common.a %{buildroot}%{_libdir}/li
 %doc AUTHORS ChangeLog NEWS README
 
 %changelog
+* Sat Nov 21 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.7.2-2mamba
+- fix group in udev rules
+
 * Thu Dec 01 2016 Automatic Build System <autodist@mambasoft.it> 1.7.2-1mamba
 - automatic version update by autodist