diff --git a/include/common/hathreads.h b/include/common/hathreads.h
index c25f691..5c4ceca 100644
--- a/include/common/hathreads.h
+++ b/include/common/hathreads.h
@@ -108,6 +108,9 @@
 #define HA_RWLOCK_TRYRDLOCK(lbl, l)   ({ 0; })
 #define HA_RWLOCK_RDUNLOCK(lbl, l) do { /* do nothing */ } while(0)
 
+#define ha_sigmask(how, set, oldset)  sigprocmask(how, set, oldset)
+
+
 static inline void __ha_barrier_load(void)
 {
 }
@@ -259,6 +262,9 @@
 
 extern unsigned long all_threads_mask;
 
+#define ha_sigmask(how, set, oldset)  pthread_sigmask(how, set, oldset)
+
+
 #if defined(DEBUG_THREAD) || defined(DEBUG_FULL)
 
 /* WARNING!!! if you update this enum, please also keep lock_label() up to date below */