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Diffstat (limited to 'sysdeps/unix/bsd/osf/bits/sigaction.h')
-rw-r--r--sysdeps/unix/bsd/osf/bits/sigaction.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/osf/bits/sigaction.h b/sysdeps/unix/bsd/osf/bits/sigaction.h
index 56e28a04fb..6bf030793e 100644
--- a/sysdeps/unix/bsd/osf/bits/sigaction.h
+++ b/sysdeps/unix/bsd/osf/bits/sigaction.h
@@ -18,6 +18,10 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef _SIGNAL_H
+# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
+#endif
+
 /* Structure describing the action to be taken when a signal arrives.  */
 struct sigaction
   {