diff --git a/include/pthread_np.h b/include/pthread_np.h
--- a/include/pthread_np.h
+++ b/include/pthread_np.h
@@ -59,6 +59,8 @@
 int pthread_peekjoin_np(pthread_t, void **);
 void pthread_set_name_np(pthread_t, const char *);
 int pthread_setaffinity_np(pthread_t, size_t, const cpuset_t *);
+void pthread_signals_block_np(void);
+void pthread_signals_unblock_np(void);
 int pthread_single_np(void);
 void pthread_suspend_all_np(void);
 int pthread_suspend_np(pthread_t);
diff --git a/lib/libthr/pthread.map b/lib/libthr/pthread.map
--- a/lib/libthr/pthread.map
+++ b/lib/libthr/pthread.map
@@ -339,5 +339,7 @@
 };
 
 FBSD_1.8 {
+	 pthread_signals_block_np;
+	 pthread_signals_unblock_np;
 	 pthread_sigqueue;
 };
diff --git a/lib/libthr/thread/thr_sig.c b/lib/libthr/thread/thr_sig.c
--- a/lib/libthr/thread/thr_sig.c
+++ b/lib/libthr/thread/thr_sig.c
@@ -37,6 +37,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <pthread.h>
+#include <pthread_np.h>
 #include "un-namespace.h"
 #include "libc_private.h"
 
@@ -163,6 +164,24 @@
 	__sys_sigfastblock(SIGFASTBLOCK_SETPTR, &curthread->fsigblock);
 }
 
+void
+pthread_signals_block_np(void)
+{
+	struct pthread *curthread;
+
+	curthread = _get_curthread();
+	_thr_signal_block(curthread);
+}
+
+void
+pthread_signals_unblock_np(void)
+{
+	struct pthread *curthread;
+
+	curthread = _get_curthread();
+	_thr_signal_unblock(curthread);
+}
+
 int
 _thr_send_sig(struct pthread *thread, int sig)
 {