diff --git a/third_party/build_unbound.sh b/third_party/build_unbound.sh
index 1a66187..8e71bc7 100755
--- a/third_party/build_unbound.sh
+++ b/third_party/build_unbound.sh
@@ -31,7 +31,7 @@ if [[ ${build_os_type} == "linux" ]]; then
 	# --with-ssl=${library_boringssl}
 	../../configure --with-libunbound-only --with-libevent=${library_event} --enable-event-api --enable-shared=no --enable-static=yes --with-pthreads --enable-pic --prefix=`pwd`
 	check_err_exit ${library_path} "Failed to configure build"
-	make CXXFLAGS="${CXX_FLAGS}" CFLAGS="${C_FLAGS}" ${MAKE_OPTIONS}
+	make CXXFLAGS="${CXX_FLAGS}" CFLAGS="${C_FLAGS} -fPIC" ${MAKE_OPTIONS}
 	check_err_exit ${library_path} "Failed to build"
 	make install
 	check_err_exit ${library_path} "Failed to install"