diff --git a/libs/freetdm/src/zap_io.c b/libs/freetdm/src/zap_io.c
index 1255b1352e..8703db8994 100644
--- a/libs/freetdm/src/zap_io.c
+++ b/libs/freetdm/src/zap_io.c
@@ -33,8 +33,8 @@
 
 #ifndef WIN32
 #define ZAP_ZT_SUPPORT
-#endif
 #define ZAP_WANPIPE_SUPPORT
+#endif
 #include "openzap.h"
 #include "zap_isdn.h"
 #include <stdarg.h>