compat: Add `stdarg.h` include
diff --git a/src/buffer.h b/src/buffer.h
index f15fdaa..1f0ec1c 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -8,6 +8,7 @@
#define INCLUDE_buffer_h__
#include "common.h"
+#include <stdarg.h>
typedef struct {
char *ptr;