diff --git a/libc/stdio/findfp.c b/libc/stdio/findfp.c
index 2696cfd..4054d5f 100644
--- a/libc/stdio/findfp.c
+++ b/libc/stdio/findfp.c
@@ -44,8 +44,6 @@
 #define ALIGNBYTES (sizeof(uintptr_t) - 1)
 #define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) &~ ALIGNBYTES)
 
-int	__sdidinit;
-
 #define	NDYNAMIC 10		/* add ten more whenever necessary */
 
 #define	std(flags, file) \
@@ -114,9 +112,6 @@
 	int n;
 	struct glue *g;
 
-	if (!__sdidinit)
-		__sinit();
-
 	_THREAD_PRIVATE_MUTEX_LOCK(__sfp_mutex);
 	for (g = &__sglue; g != NULL; g = g->next) {
 		for (fp = g->iobs, n = g->niobs; --n >= 0; fp++)
@@ -149,48 +144,21 @@
 	return (fp);
 }
 
-/*
- * exit() and abort() call _cleanup() through the callback registered
- * with __atexit_register_cleanup(), set whenever we open or buffer a
- * file. This chicanery is done so that programs that do not use stdio
- * need not link it all in.
- *
- * The name `_cleanup' is, alas, fairly well known outside stdio.
- */
-void
-_cleanup(void)
-{
+static void __stdio_cleanup(void) {
 	/* (void) _fwalk(fclose); */
 	(void) _fwalk(__sflush);		/* `cheating' */
 }
 
-/*
- * __sinit() is called whenever stdio's internal variables must be set up.
- */
-void
-__sinit(void)
-{
-	_THREAD_PRIVATE_MUTEX(__sinit_mutex);
-
-	_THREAD_PRIVATE_MUTEX_LOCK(__sinit_mutex);
-	if (__sdidinit) {
-		/* bail out if caller lost the race */
-		_THREAD_PRIVATE_MUTEX_UNLOCK(__sinit_mutex);
-		return;
-	}
-
-	/* Initialize stdin/stdout/stderr (for the recursive mutex). http://b/18208568. */
+void __libc_init_stdio(void) {
+	// Initialize stdin/stdout/stderr (for the recursive mutex). http://b/18208568.
 	for (size_t i = 0; i < 3; ++i) {
 		_FILEEXT_SETUP(__sF+i, __sFext+i);
 	}
-	/* Initialize the pre-allocated (but initially unused) streams. */
+	// Initialize the pre-allocated (but initially unused) streams.
 	for (size_t i = 0; i < FOPEN_MAX - 3; ++i) {
 		_FILEEXT_SETUP(usual+i, usualext+i);
 	}
 
-	/* make sure we clean up on exit */
-	__atexit_register_cleanup(_cleanup); /* conservative */
-	__sdidinit = 1;
-
-	_THREAD_PRIVATE_MUTEX_UNLOCK(__sinit_mutex);
+	// Make sure we clean up on exit.
+	__atexit_register_cleanup(__stdio_cleanup); /* conservative */
 }