diff --git a/libusb.spec b/libusb.spec
index 78adae8..7fda4cf 100644
--- a/libusb.spec
+++ b/libusb.spec
@@ -1,6 +1,6 @@
 Name:          libusb
 Version:       1.0.21
-Release:       1mamba
+Release:       2mamba
 Summary:       A library that provides generic access to USB devices
 Group:         System/Libraries
 Vendor:        openmamba
@@ -33,8 +33,6 @@ libusbx is a library that provides generic access to USB devices. As a library,
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
-Provides:      libusb-devel
-Obsoletes:     libusb-devel
 Provides:      libusb1-devel
 Obsoletes:     libusb1-devel
 Provides:      libusbx-devel
@@ -82,6 +80,9 @@ ln -sf libusb-1.0.so.0 %{buildroot}%{_libdir}/libusb-1.0.so.2
 %doc ChangeLog NEWS README TODO
 
 %changelog
+* Wed Aug 30 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.21-2mamba
+- libusb-devel: don't obsolete libusb-devel itself
+
 * Tue Nov 22 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.21-1mamba
 - update to 1.0.21