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-rw-r--r--usr/src/head/unistd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/usr/src/head/unistd.h b/usr/src/head/unistd.h
index 2ea8c42c15..75078dd318 100644
--- a/usr/src/head/unistd.h
+++ b/usr/src/head/unistd.h
@@ -536,7 +536,7 @@ extern int unlink(const char *);
extern int usleep(useconds_t);
#endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2)... */
#if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || defined(__EXTENSIONS__)
-extern pid_t vfork(void);
+extern pid_t vfork(void) __RETURNS_TWICE;
#endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2)... */
#if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
extern void vhangup(void);