diff --git a/src/hidapi/windows/hid.c b/src/hidapi/windows/hid.c
index 4fa7065..f508ee1 100644
--- a/src/hidapi/windows/hid.c
+++ b/src/hidapi/windows/hid.c
@@ -197,7 +197,7 @@
 			VER_MINORVERSION, VER_GREATER_EQUAL ),
 		VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL );
 
-	SDL_zero( osvi );
+	memset(&osvi, 0, sizeof(osvi));
 	osvi.dwOSVersionInfoSize = sizeof( osvi );
 	osvi.dwMajorVersion = wMajorVersion;
 	osvi.dwMinorVersion = wMinorVersion;
@@ -751,7 +751,6 @@
 {
 	DWORD bytes_written;
 	BOOL res;
-	size_t stashed_length = length;
 	unsigned char *buf;
 
 	if (dev->use_hid_write_output_report) {