1 files changed, 1 insertions, 1 deletions
diff --git a/src/dbg.h b/src/dbg.h
index 114b6ca..a794f84 100644
--- a/src/dbg.h
+++ b/src/dbg.h
@@ -41,7 +41,7 @@ static int xprintf(int fd, const char *fmt, ...)
 
 	va_start(ap, fmt);
 	r = vsnprintf(buf, sizeof(buf), fmt, ap);
-	if (r > 0)
+	if (r > 0 && (unsigned int)r < sizeof(buf))
 		r = write(fd, buf, r);
 	va_end(ap);
 	return r;