diff --git a/tests/fuzz/ossfuzz.sh b/tests/fuzz/ossfuzz.sh
new file mode 100755
index 000000000..28a1581f2
--- /dev/null
+++ b/tests/fuzz/ossfuzz.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# SPDX-FileCopyrightText: 2025 Sébastien Helleu <flashcode@flashtux.org>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# This script is meant to be run by OSS-Fuzz, see:
+# https://github.com/google/oss-fuzz/blob/master/projects/weechat/Dockerfile
+
+set -o errexit
+
+src_dir="${SRC}"/weechat
+build_dir="${WORK}"/build
+
+cd "${src_dir}"
+
+# apply patch for Ubuntu Focal (needed because CMake version is too old)
+git apply tools/debian/patches/weechat_ubuntu_focal.patch
+
+mkdir -p "${build_dir}"
+cd "${build_dir}"
+cmake \
+    -DCMAKE_BUILD_TYPE=Debug \
+    -DENABLE_CJSON=OFF \
+    -DENABLE_COVERAGE=ON \
+    -DENABLE_FUZZ=ON \
+    "${src_dir}"
+make -j "$(nproc)"
+
+cp tests/fuzz/weechat_*_fuzzer "${OUT}"/
+cp "${src_dir}"/tests/fuzz/core/*.dict "${OUT}"/