1 files changed, 3 insertions, 2 deletions

diff --git a/defines.h b/defines.h
index e37e1647e..7855fbf90 100644
--- a/defines.h
+++ b/defines.h
@@ -839,9 +839,10 @@ struct winsize {
 /*
  * We want functions in openbsd-compat, if enabled, to override system ones.
  * We no-op out the weak symbol definition rather than remove it to reduce
- * future sync problems.
+ * future sync problems.  Some compilers (eg Unixware) do not allow an
+ * empty statement, so we use a bogus function declaration.
  */
-#define DEF_WEAK(x)
+#define DEF_WEAK(x)     void __ssh_compat_weak_##x(void)
 
 /*
  * Platforms that have arc4random_uniform() and not arc4random_stir()