diff --git a/libwebp.spec b/libwebp.spec
index ae68075c033a89d82851b67d958b728c4d8a4476..9ea594dd14ff991f2d2c0f492817542ec4ebd49e 100644
--- a/libwebp.spec
+++ b/libwebp.spec
@@ -1,6 +1,6 @@
 Name:          libwebp
 Version:       1.3.1
-Release:       1
+Release:       2
 URL:           http://www.linuxfromscratch.org/blfs/view/svn/general/libwebp.html
 Summary:       Library and tools for the WebP graphics format
 License:       BSD
@@ -10,7 +10,7 @@ Patch6000:     libwebp-freeglut.patch
 
 BuildRequires: libjpeg-devel libpng-devel giflib-devel libtiff-devel
 BuildRequires: java-devel jpackage-utils swig freeglut-devel
-BuildRequires: autoconf automake libtool
+BuildRequires: autoconf automake libtool clang
 
 %description
 This is an image format that does lossy compression of digital
@@ -50,6 +50,11 @@ Java bindings for libwebp.
 %autosetup -n %{name}-%{version} -p1
 
 %build
+sed -i 's/libwebpmux.a/.libs\/l\ibwebpmux.a/g' tests/fuzzer/makefile.unix
+sed -i 's/libwebpdemux.a/.libs\/l\ibwebpdemux.a/g' tests/fuzzer/makefile.unix
+sed -i 's/libwebp.a/.libs\/l\ibwebp.a/g' tests/fuzzer/makefile.unix
+sed -i 's/libimageio_util.a/.libs\/l\ibimageio_util.a/g' tests/fuzzer/makefile.unix
+sed -i 's/libsharpyuv.a/.libs\/l\ibsharpyuv.a/g' tests/fuzzer/makefile.unix
 autoreconf -vif
 %ifarch aarch64
 export CFLAGS="%{optflags} -frename-registers"
@@ -84,6 +89,10 @@ cp swig/*.jar swig/*.so %{buildroot}/%{_libdir}/%{name}-java/
 %delete_la
 %ldconfig_scriptlets
 
+%check
+cd tests
+make -C fuzzer -f makefile.unix
+
 %files tools
 %defattr(-,root,root)
 %{_bindir}/*