diff --git a/src/system/libroot/posix/signal/sigprocmask.c b/src/system/libroot/posix/signal/sigprocmask.c
index e304f105eb..505ab53f12 100644
--- a/src/system/libroot/posix/signal/sigprocmask.c
+++ b/src/system/libroot/posix/signal/sigprocmask.c
@@ -22,3 +22,10 @@ sigprocmask(int how, const sigset_t *set, sigset_t *oldSet)
 	return 0;
 }
 
+
+int
+pthread_sigmask(int how, const sigset_t *set, sigset_t *oldSet)
+{
+	return sigprocmask(how, set, oldSet);
+}
+