diff --git a/c/src/exec/posix/headers/psignal.h b/c/src/exec/posix/headers/psignal.h
index 981e07883c..1262ba7cf5 100644
--- a/c/src/exec/posix/headers/psignal.h
+++ b/c/src/exec/posix/headers/psignal.h
@@ -5,6 +5,8 @@
 #ifndef __POSIX_SIGNALS_h
 #define __POSIX_SIGNALS_h
 
+void _POSIX_signals_Manager_Initialization( void );
+
 void _POSIX_signals_Post_switch_extension(
   Thread_Control  *the_thread
 );
diff --git a/c/src/exec/posix/include/rtems/posix/psignal.h b/c/src/exec/posix/include/rtems/posix/psignal.h
index 981e07883c..1262ba7cf5 100644
--- a/c/src/exec/posix/include/rtems/posix/psignal.h
+++ b/c/src/exec/posix/include/rtems/posix/psignal.h
@@ -5,6 +5,8 @@
 #ifndef __POSIX_SIGNALS_h
 #define __POSIX_SIGNALS_h
 
+void _POSIX_signals_Manager_Initialization( void );
+
 void _POSIX_signals_Post_switch_extension(
   Thread_Control  *the_thread
 );
diff --git a/cpukit/posix/include/rtems/posix/psignal.h b/cpukit/posix/include/rtems/posix/psignal.h
index 981e07883c..1262ba7cf5 100644
--- a/cpukit/posix/include/rtems/posix/psignal.h
+++ b/cpukit/posix/include/rtems/posix/psignal.h
@@ -5,6 +5,8 @@
 #ifndef __POSIX_SIGNALS_h
 #define __POSIX_SIGNALS_h
 
+void _POSIX_signals_Manager_Initialization( void );
+
 void _POSIX_signals_Post_switch_extension(
   Thread_Control  *the_thread
 );