diff --git a/Python/thread_lwp.h b/Python/thread_lwp.h
index 93d8295..ba7b37a 100644
--- a/Python/thread_lwp.h
+++ b/Python/thread_lwp.h
@@ -3,13 +3,13 @@
 #include <lwp/lwp.h>
 #include <lwp/stackdep.h>
 
-#define STACKSIZE	1000	/* stacksize for a thread */
-#define NSTACKS		2	/* # stacks to be put in cache initially */
+#define STACKSIZE       1000    /* stacksize for a thread */
+#define NSTACKS         2       /* # stacks to be put in cache initially */
 
 struct lock {
-	int lock_locked;
-	cv_t lock_condvar;
-	mon_t lock_monitor;
+    int lock_locked;
+    cv_t lock_condvar;
+    mon_t lock_monitor;
 };
 
 
@@ -18,7 +18,7 @@
  */
 static void PyThread__init_thread(void)
 {
-	lwp_setstkcache(STACKSIZE, NSTACKS);
+    lwp_setstkcache(STACKSIZE, NSTACKS);
 }
 
 /*
@@ -28,31 +28,31 @@
 
 long PyThread_start_new_thread(void (*func)(void *), void *arg)
 {
-	thread_t tid;
-	int success;
-	dprintf(("PyThread_start_new_thread called\n"));
-	if (!initialized)
-		PyThread_init_thread();
-	success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg);
-	return success < 0 ? -1 : 0;
+    thread_t tid;
+    int success;
+    dprintf(("PyThread_start_new_thread called\n"));
+    if (!initialized)
+        PyThread_init_thread();
+    success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg);
+    return success < 0 ? -1 : 0;
 }
 
 long PyThread_get_thread_ident(void)
 {
-	thread_t tid;
-	if (!initialized)
-		PyThread_init_thread();
-	if (lwp_self(&tid) < 0)
-		return -1;
-	return tid.thread_id;
+    thread_t tid;
+    if (!initialized)
+        PyThread_init_thread();
+    if (lwp_self(&tid) < 0)
+        return -1;
+    return tid.thread_id;
 }
 
 void PyThread_exit_thread(void)
 {
-	dprintf(("PyThread_exit_thread called\n"));
-	if (!initialized)
-		exit(0);
-	lwp_destroy(SELF);
+    dprintf(("PyThread_exit_thread called\n"));
+    if (!initialized)
+        exit(0);
+    lwp_destroy(SELF);
 }
 
 /*
@@ -60,54 +60,54 @@
  */
 PyThread_type_lock PyThread_allocate_lock(void)
 {
-	struct lock *lock;
-	extern char *malloc(size_t);
+    struct lock *lock;
+    extern char *malloc(size_t);
 
-	dprintf(("PyThread_allocate_lock called\n"));
-	if (!initialized)
-		PyThread_init_thread();
+    dprintf(("PyThread_allocate_lock called\n"));
+    if (!initialized)
+        PyThread_init_thread();
 
-	lock = (struct lock *) malloc(sizeof(struct lock));
-	lock->lock_locked = 0;
-	(void) mon_create(&lock->lock_monitor);
-	(void) cv_create(&lock->lock_condvar, lock->lock_monitor);
-	dprintf(("PyThread_allocate_lock() -> %p\n", lock));
-	return (PyThread_type_lock) lock;
+    lock = (struct lock *) malloc(sizeof(struct lock));
+    lock->lock_locked = 0;
+    (void) mon_create(&lock->lock_monitor);
+    (void) cv_create(&lock->lock_condvar, lock->lock_monitor);
+    dprintf(("PyThread_allocate_lock() -> %p\n", lock));
+    return (PyThread_type_lock) lock;
 }
 
 void PyThread_free_lock(PyThread_type_lock lock)
 {
-	dprintf(("PyThread_free_lock(%p) called\n", lock));
-	mon_destroy(((struct lock *) lock)->lock_monitor);
-	free((char *) lock);
+    dprintf(("PyThread_free_lock(%p) called\n", lock));
+    mon_destroy(((struct lock *) lock)->lock_monitor);
+    free((char *) lock);
 }
 
 int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
 {
-	int success;
+    int success;
 
-	dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
-	success = 0;
+    dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
+    success = 0;
 
-	(void) mon_enter(((struct lock *) lock)->lock_monitor);
-	if (waitflag)
-		while (((struct lock *) lock)->lock_locked)
-			cv_wait(((struct lock *) lock)->lock_condvar);
-	if (!((struct lock *) lock)->lock_locked) {
-		success = 1;
-		((struct lock *) lock)->lock_locked = 1;
-	}
-	cv_broadcast(((struct lock *) lock)->lock_condvar);
-	mon_exit(((struct lock *) lock)->lock_monitor);
-	dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
-	return success;
+    (void) mon_enter(((struct lock *) lock)->lock_monitor);
+    if (waitflag)
+        while (((struct lock *) lock)->lock_locked)
+            cv_wait(((struct lock *) lock)->lock_condvar);
+    if (!((struct lock *) lock)->lock_locked) {
+        success = 1;
+        ((struct lock *) lock)->lock_locked = 1;
+    }
+    cv_broadcast(((struct lock *) lock)->lock_condvar);
+    mon_exit(((struct lock *) lock)->lock_monitor);
+    dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
+    return success;
 }
 
 void PyThread_release_lock(PyThread_type_lock lock)
 {
-	dprintf(("PyThread_release_lock(%p) called\n", lock));
-	(void) mon_enter(((struct lock *) lock)->lock_monitor);
-	((struct lock *) lock)->lock_locked = 0;
-	cv_broadcast(((struct lock *) lock)->lock_condvar);
-	mon_exit(((struct lock *) lock)->lock_monitor);
+    dprintf(("PyThread_release_lock(%p) called\n", lock));
+    (void) mon_enter(((struct lock *) lock)->lock_monitor);
+    ((struct lock *) lock)->lock_locked = 0;
+    cv_broadcast(((struct lock *) lock)->lock_condvar);
+    mon_exit(((struct lock *) lock)->lock_monitor);
 }