1 files changed, 5 insertions, 4 deletions

diff --git a/libusb/os/windows_compat.h b/libusb/os/windows_compat.h
index 4eeb6e9..689b82a 100644
--- a/libusb/os/windows_compat.h
+++ b/libusb/os/windows_compat.h
@@ -54,10 +54,11 @@ enum rw_type {
 
 // fd struct that can be used for polling on Windows
 struct winfd {
-	int fd;                  // what's exposed to libusb core
-	HANDLE handle;           // what we need to attach overlapped to the I/O op, so we can poll it
-	OVERLAPPED* overlapped;  // what will report our I/O status
-	enum rw_type rw;         // I/O transfer direction: read *XOR* write (NOT BOTH)
+	int fd;				            // what's exposed to libusb core
+	HANDLE handle;                  // what we need to attach overlapped to the I/O op, so we can poll it
+	OVERLAPPED* overlapped;         // what will report our I/O status
+	enum rw_type rw;                // I/O transfer direction: read *XOR* write (NOT BOTH)
+	BOOLEAN completed_synchronously;// flag for async transfers that completed during request
 };
 extern const struct winfd INVALID_WINFD;