diff --git a/src/debug.cpp b/src/debug.cpp
index f80604396..5bd7e545f 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -242,6 +242,24 @@ bool set_log_level(const char *optarg, bool *logger_repeat_msgs) {
         return false;
 }
 
+void Logger::preinit(bool skip_repeated)
+{
+        Logger::skip_repeated = skip_repeated;
+        if (rang::rang_implementation::supportsColor()
+                        && rang::rang_implementation::isTerminal(std::cout.rdbuf())
+                        && rang::rang_implementation::isTerminal(std::cerr.rdbuf())) {
+                // force ANSI sequences even when written to ostringstream
+                rang::setControlMode(rang::control::Force);
+#ifdef _WIN32
+                // ANSI control sequences need to be explicitly set in Windows
+                if (rang::rang_implementation::setWinTermAnsiColors(std::cout.rdbuf()) &&
+                                rang::rang_implementation::setWinTermAnsiColors(std::cerr.rdbuf())) {
+                        rang::setWinTermMode(rang::winTerm::Ansi);
+                }
+#endif
+        }
+}
+
 std::atomic<Logger::last_message *> Logger::last_msg{};
 bool Logger::skip_repeated = true;
 
diff --git a/src/debug.h b/src/debug.h
index 5e4aaacc6..723fb4ef8 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -96,20 +96,7 @@ bool set_log_level(const char *optarg, bool *logger_repeat_msgs);
 class Logger
 {
 public:
-        static void preinit(bool skip_repeated) {
-                Logger::skip_repeated = skip_repeated;
-                if (rang::rang_implementation::supportsColor()
-                                && rang::rang_implementation::isTerminal(std::clog.rdbuf())) {
-                        // force ANSI sequences even when written to ostringstream
-                        rang::setControlMode(rang::control::Force);
-#ifdef _WIN32
-                        // ANSI control sequences need to be explicitly set in Windows
-                        if (rang::rang_implementation::setWinTermAnsiColors(std::clog.rdbuf())) {
-                                rang::setWinTermMode(rang::winTerm::Ansi);
-                        }
-#endif
-                }
-        }
+        static void preinit(bool skip_repeated);
         inline Logger(int l) : level(l) {}
         inline ~Logger() {
                 rang::fg color = rang::fg::reset;