diff --git a/glu.spec b/glu.spec
index 8efc194..959835a 100644
--- a/glu.spec
+++ b/glu.spec
@@ -1,7 +1,7 @@
 Name:          glu
 Epoch:         1
 Version:       9.0.3
-Release:       1mamba
+Release:       2mamba
 Summary:       Utility library for the Mesa implementation of the OpenGL 3-D graphics library
 Group:         System/Libraries
 Vendor:        openmamba
@@ -34,8 +34,8 @@ Utility library for the Mesa implementation of the OpenGL 3-D graphics library.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      libGLU = %{?epoch:%epoch:}%{version}-%{release}
-Provides:      libglu-devel
-Obsoletes:     libglu-devel < 1:9.0.3
+Provides:      libGLU-devel
+Obsoletes:     libGLU-devel < 1:9.0.3
 Provides:      libGLU-static
 Obsoletes:     libGLU-static < 1:9.0.3
 
@@ -76,6 +76,9 @@ aries files for developing applications that use %{name}.
 %{_libdir}/pkgconfig/glu.pc
 
 %changelog
+* Sun Jul 30 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 9.0.3-2mamba
+- libglu-devel: fix obsoleting libGLU-devel
+
 * Fri Jul 28 2023 Automatic Build System <autodist@mambasoft.it> 9.0.3-1mamba
 - automatic version update by autodist