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-rw-r--r--posix/unistd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index 1b52930225..bb61ad782e 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -1058,7 +1058,7 @@ extern void *sbrk (intptr_t __delta) __THROW;
 
    In Mach, all system calls take normal arguments and always return an
    error code (zero for success).  */
-extern long int syscall (long int __sysno, ...) __THROW;
+extern __syscall_slong_t syscall (long int __sysno, ...) __THROW;
 
 #endif	/* Use misc.  */