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Diffstat (limited to 'src/thread/pthread_sigmask.c')
-rw-r--r--src/thread/pthread_sigmask.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/thread/pthread_sigmask.c b/src/thread/pthread_sigmask.c
index decc38f8..cddc2bca 100644
--- a/src/thread/pthread_sigmask.c
+++ b/src/thread/pthread_sigmask.c
@@ -6,8 +6,8 @@
 int pthread_sigmask(int how, const sigset_t *set, sigset_t *old)
 {
 	int ret;
-	if (how > 2U) return EINVAL;
-	ret = -__syscall(SYS_rt_sigprocmask, how, set, old, 8);
+	if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
+	ret = -__syscall(SYS_rt_sigprocmask, how, set, old, __SYSCALL_SSLEN);
 	if (!ret && old) {
 		if (sizeof old->__bits[0] == 8) {
 			old->__bits[0] &= ~0x380000000ULL;