diff --git a/doxygen.spec b/doxygen.spec
index 11d4418..2e6c282 100644
--- a/doxygen.spec
+++ b/doxygen.spec
@@ -1,7 +1,9 @@
 %if 0%{?fedora}
 %global xapian_core_support ON
+%global clang_support ON
 %else
 %global xapian_core_support OFF
+%global clang_support OFF
 %endif
 %global BuildDir Out
 
@@ -9,7 +11,7 @@ Summary: A documentation system for C/C++
 Name:    doxygen
 Epoch:   1
 Version: 1.8.18
-Release: 2%{?dist}
+Release: 3%{?dist}
 
 # No version is specified.
 License: GPL+
@@ -101,6 +103,9 @@ BuildRequires: git
 BuildRequires: xapian-core-devel
 BuildRequires: zlib-devel
 %endif
+%if "x%{?clang_support}" == "xON"
+BuildRequires: llvm-devel
+%endif
 Requires: perl-interpreter
 Requires: graphviz
 
@@ -210,6 +215,7 @@ pushd %{BuildDir}
 %if ! 0%{?_module_build}
 %cmake \
       -DPYTHON_EXECUTABLE=%{_bindir}/python3 \
+      -Duse_libclang=%{clang_support} \
       -Dbuild_doc=OFF \
       -Dbuild_wizard=ON \
       -Dbuild_xmlparser=ON \
@@ -221,6 +227,7 @@ pushd %{BuildDir}
 %else
 %cmake \
       -DPYTHON_EXECUTABLE=%{_bindir}/python3 \
+      -Duse_libclang=%{clang_support} \
       -Dbuild_doc=OFF \
       -Dbuild_wizard=OFF \
       -Dbuild_xmlparser=ON \
@@ -298,6 +305,9 @@ make tests -C %{BuildDir}
 %endif
 
 %changelog
+* Thu Jun 18 2020 Than Ngo <than@redhat.com> - 1.8.18-3
+- fixed bz#1834591, enable clang support in fedora
+
 * Wed May 27 2020 Tom Callaway <spot@fedoraproject.org> - 1.8.18-2
 - update tex dependencies