diff --git a/c/src/exec/posix/headers/threadsup.h b/c/src/exec/posix/headers/threadsup.h
index c16cf728d6..b276e22b0b 100644
--- a/c/src/exec/posix/headers/threadsup.h
+++ b/c/src/exec/posix/headers/threadsup.h
@@ -17,6 +17,10 @@ typedef struct {
   struct sched_param      schedparam;
   Watchdog_Control        Sporadic_timer;
 
+  sigset_t                signals_blocked;
+  sigset_t                signals_pending;
+  sigset_t                signals_posted;
+
 #if 0
   /*
    *  POSIX Interrupts 
diff --git a/c/src/exec/posix/include/rtems/posix/threadsup.h b/c/src/exec/posix/include/rtems/posix/threadsup.h
index c16cf728d6..b276e22b0b 100644
--- a/c/src/exec/posix/include/rtems/posix/threadsup.h
+++ b/c/src/exec/posix/include/rtems/posix/threadsup.h
@@ -17,6 +17,10 @@ typedef struct {
   struct sched_param      schedparam;
   Watchdog_Control        Sporadic_timer;
 
+  sigset_t                signals_blocked;
+  sigset_t                signals_pending;
+  sigset_t                signals_posted;
+
 #if 0
   /*
    *  POSIX Interrupts 
diff --git a/cpukit/posix/include/rtems/posix/threadsup.h b/cpukit/posix/include/rtems/posix/threadsup.h
index c16cf728d6..b276e22b0b 100644
--- a/cpukit/posix/include/rtems/posix/threadsup.h
+++ b/cpukit/posix/include/rtems/posix/threadsup.h
@@ -17,6 +17,10 @@ typedef struct {
   struct sched_param      schedparam;
   Watchdog_Control        Sporadic_timer;
 
+  sigset_t                signals_blocked;
+  sigset_t                signals_pending;
+  sigset_t                signals_posted;
+
 #if 0
   /*
    *  POSIX Interrupts