diff --git a/include/spdlog/sinks/syslog_sink.h b/include/spdlog/sinks/syslog_sink.h
index 43ffef6b..fe868c32 100644
--- a/include/spdlog/sinks/syslog_sink.h
+++ b/include/spdlog/sinks/syslog_sink.h
@@ -73,7 +73,8 @@ protected:
     bool enable_formatting_ = false;
 
 private:
-    std::array<int, 7> syslog_levels_;
+    using levels_array = std::array<int, 7>;
+    levels_array syslog_levels_;
     // must store the ident because the man says openlog might use the pointer as
     // is and not a string copy
     const std::string ident_;
@@ -83,7 +84,7 @@ private:
     //
     int syslog_prio_from_level(const details::log_msg &msg) const
     {
-        return syslog_levels_.at(static_cast<int>(msg.level));
+        return syslog_levels_.at(static_cast<levels_array::size_type>(msg.level));
     }
 };
 
diff --git a/include/spdlog/sinks/systemd_sink.h b/include/spdlog/sinks/systemd_sink.h
index a0d6e31e..c63cf723 100644
--- a/include/spdlog/sinks/systemd_sink.h
+++ b/include/spdlog/sinks/systemd_sink.h
@@ -38,7 +38,8 @@ public:
     systemd_sink &operator=(const systemd_sink &) = delete;
 
 protected:
-    std::array<int, 7> syslog_levels_;
+    using levels_array = std::array<int, 7>;
+    levels_array syslog_levels_;
 
     void sink_it_(const details::log_msg &msg) override
     {
@@ -72,7 +73,7 @@ protected:
 
     int syslog_level(level::level_enum l)
     {
-        return syslog_levels_.at(static_cast<int>(l));
+        return syslog_levels_.at(static_cast<levels_array::size_type>(l));
     }
 
     void flush_() override {}