diff --git a/buffer_iocp.c b/buffer_iocp.c
index 7da74431..bae08434 100644
--- a/buffer_iocp.c
+++ b/buffer_iocp.c
@@ -32,6 +32,7 @@
 */
 
 #include "event2/buffer.h"
+#include "event2/buffer_compat.h"
 #include "event2/util.h"
 #include "event2/thread.h"
 #include "event-config.h"