diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index b5d8c89a0..f5e66b58c 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2014-08-18 Corinna Vinschen  <vinschen@redhat.com>
+
+	* libc/include/sys/signal.h: Declare sigaltstack for RTEMS only.
+
 2014-08-18  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* libc/include/sys/config.h[__m68k__]: Set _READ_WRITE_RETURN_TYPE
diff --git a/newlib/libc/include/sys/signal.h b/newlib/libc/include/sys/signal.h
index bbc2cd988..82802e2a1 100644
--- a/newlib/libc/include/sys/signal.h
+++ b/newlib/libc/include/sys/signal.h
@@ -192,10 +192,11 @@ int _EXFUN(sigpending, (sigset_t *));
 int _EXFUN(sigsuspend, (const sigset_t *));
 int _EXFUN(sigpause, (int));
 
-
+#ifdef __rtems__
 #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
 int _EXFUN(sigaltstack, (const stack_t *__restrict, stack_t *__restrict));
 #endif
+#endif
 
 #if defined(_POSIX_THREADS)
 #ifdef __CYGWIN__