1 files changed, 1 insertions, 0 deletions

diff --git a/x2p/a2p.h b/x2p/a2p.h
index 3b0338ca02..51a69dd11d 100644
--- a/x2p/a2p.h
+++ b/x2p/a2p.h
@@ -121,6 +121,7 @@
 
 #ifdef DOSISH
 # if defined(OS2)
+#   define PTHX_UNUSED
 #   include "../os2ish.h"
 # else
 #   include "../dosish.h"