diff --git a/src/utils/journal.cpp b/src/utils/journal.cpp
new file mode 100644
index 0000000..9ea9a1f
--- /dev/null
+++ b/src/utils/journal.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2016-2019 CESNET, https://photonics.cesnet.cz/
+ *
+ * Written by Jan Kundrát <jan.kundrat@cesnet.cz>
+ *
+*/
+
+#include <cstdio>
+#include <cstdlib>
+#include <inttypes.h>
+#include <spdlog/sinks/systemd_sink.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "utils/journal.h"
+
+namespace velia::utils {
+
+/** @short Is stderr connected to journald? Not thread safe. */
+bool isJournaldActive()
+{
+    const auto stream = ::getenv("JOURNAL_STREAM");
+    if (!stream) {
+        return false;
+    }
+    uintmax_t dev;
+    uintmax_t inode;
+    if (::sscanf(stream, "%" SCNuMAX ":%" SCNuMAX, &dev, &inode) != 2) {
+        return false;
+    }
+    struct stat buf;
+    if (fstat(STDERR_FILENO, &buf)) {
+        return false;
+    }
+    return static_cast<uintmax_t>(buf.st_dev) == dev && static_cast<uintmax_t>(buf.st_ino) == inode;
+}
+
+namespace impl {
+/** @short Provide better levels, see https://github.com/gabime/spdlog/pull/1292#discussion_r340777258 */
+template <typename Mutex>
+class journald_sink : public spdlog::sinks::systemd_sink<Mutex> {
+public:
+    journald_sink()
+    {
+        this->syslog_levels_ = {/* spdlog::level::trace      */ LOG_DEBUG,
+                                /* spdlog::level::debug      */ LOG_INFO,
+                                /* spdlog::level::info       */ LOG_NOTICE,
+                                /* spdlog::level::warn       */ LOG_WARNING,
+                                /* spdlog::level::err        */ LOG_ERR,
+                                /* spdlog::level::critical   */ LOG_CRIT,
+                                /* spdlog::level::off        */ LOG_ALERT};
+    }
+};
+}
+
+std::shared_ptr<spdlog::sinks::sink> create_journald_sink()
+{
+    return std::make_shared<impl::journald_sink<std::mutex>>();
+}
+}