diff --git a/libc/stdio/puts.c b/libc/stdio/puts.c
    index 67775ff..7e2bfd6 100644
    --- a/libc/stdio/puts.c
    +++ b/libc/stdio/puts.c
    @@ -6,8 +6,17 @@
      */

     #include "_stdio.h"
    +#ifdef __UCLIBC_HAS_THREADS__
    +#include "pthreadP.h"


    +static void my_unlock(void *u)
    +{
    +       __lll_unlock(u, LLL_PRIVATE);
    +}
    +
    +#endif
    +
     int puts(register const char * __restrict s)
     {
            register FILE *stream = stdout; /* This helps bcc optimize. */
    @@ -21,12 +30,16 @@ int puts(register const char * __restrict s)
             * then we could have a newline in the buffer of an LBF stream. */

            /* Note: Nonportable as fputs need only return nonnegative on success. */
    +
    +
    +       pthread_cleanup_push(my_unlock, (&(stream->__lock.lock)));
            if ((n = fputs_unlocked(s, stream)) != EOF) {
                    ++n;
                    if (__fputc_unlocked('\n', stream) == EOF) {
                            n = EOF;
                    }
            }
    +       pthread_cleanup_pop(0);

            __STDIO_AUTO_THREADUNLOCK(stream);