--- coregrind/m_sigframe/sigframe-common.c.orig
+++ coregrind/m_sigframe/sigframe-common.c
@@ -47,7 +47,7 @@
    VG_TRACK( new_mem_stack_signal, addr - VG_STACK_REDZONE_SZB, size, tid );
 }
 
-#if defined(VGO_linux) || defined(VGO_solaris) || defined(VGO_freebsd)
+#if defined(VGO_linux) || defined(VGO_solaris) || defined(VGO_freebsd) || defined(VGO_openbsd)
 
 /* Extend the stack segment downwards if needed so as to ensure the
    new signal frames are mapped to something.  Return a Bool
