diff --git a/contrib/win32/openssh/config.h.vs b/contrib/win32/openssh/config.h.vs
index 560381ea3..976d7f107 100644
--- a/contrib/win32/openssh/config.h.vs
+++ b/contrib/win32/openssh/config.h.vs
@@ -1733,3 +1733,4 @@
 #define WITH_ZLIB
 #define _PATH_TTY "conin$"
 #define HAVE_STRUCT_POLLFD_FD 1
+#define HAVE_KILLPG 1