diff --git a/lib/thread.c b/lib/thread.c
index 44183257bb..fd79503cc6 100644
--- a/lib/thread.c
+++ b/lib/thread.c
@@ -2143,14 +2143,6 @@ void debug_signals(const sigset_t *sigs)
 	zlog_debug("%s: %s", __func__, buf);
 }
 
-bool thread_is_scheduled(struct thread *thread)
-{
-	if (thread == NULL)
-		return false;
-
-	return true;
-}
-
 static ssize_t printfrr_thread_dbg(struct fbuf *buf, struct printfrr_eargs *ea,
 				   const struct thread *thread)
 {
diff --git a/lib/thread.h b/lib/thread.h
index a2049ae52a..acdcec51de 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -283,7 +283,14 @@ extern pthread_key_t thread_current;
 extern char *thread_timer_to_hhmmss(char *buf, int buf_size,
 		struct thread *t_timer);
 
-extern bool thread_is_scheduled(struct thread *thread);
+static inline bool thread_is_scheduled(struct thread *thread)
+{
+	if (thread)
+		return true;
+
+	return false;
+}
+
 /* Debug signal mask */
 void debug_signals(const sigset_t *sigs);