diff --git a/microsoft-gsl.spec b/microsoft-gsl.spec
index d90d5b0..ebe895f 100644
--- a/microsoft-gsl.spec
+++ b/microsoft-gsl.spec
@@ -1,6 +1,6 @@
 Name:          microsoft-gsl
 Version:       4.0.0
-Release:       2mamba
+Release:       3mamba
 Summary:       Functions and types that are suggested for use by the C++ Core Guidelines maintained by the Standard C++ Foundation
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -40,7 +40,6 @@ This package contains libraries and header files for developing applications tha
 
 %build
 %cmake -d build \
-   -DCMAKE_INSTALL_INCLUDEDIR=%{_includedir}/microsoft \
    -DGSL_TEST=OFF
 
 %make
@@ -54,14 +53,15 @@ This package contains libraries and header files for developing applications tha
 
 %files -n lib%{name}-devel
 %defattr(-,root,root)
-%dir %{_includedir}/microsoft
-%dir %{_includedir}/microsoft/gsl
-%{_includedir}/microsoft/gsl/*
+%{_includedir}/gsl/*
 %dir %{_datadir}/cmake/Microsoft.GSL
 %{_datadir}/cmake/Microsoft.GSL/Microsoft.GSLConfig*.cmake
 %doc LICENSE
 
 %changelog
+* Sun Mar 10 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 4.0.0-3mamba
+- revert from /usr/include/microsoft to /usr/include header dir for mixxx 2.4.0
+
 * Thu Apr 28 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 4.0.0-2mamba
 - install below %_includedir/microsoft to avoid conflicts with libgsl