diff --git a/spim/include/ape/stdarg.h b/spim/include/ape/stdarg.h
new file mode 100644
index 000000000..9a1f08c7e
--- /dev/null
+++ b/spim/include/ape/stdarg.h
@@ -0,0 +1,12 @@
+#ifndef __STDARG
+#define __STDARG
+
+typedef char *va_list;
+
+#define va_start(list, start) list = (char *)(&(start)+1)
+#define va_end(list)
+#define va_arg(list, mode) (sizeof(mode)==1 ? ((mode *) (list += 4))[-4] : \
+sizeof(mode)==2 ? ((mode *) (list += 4))[-2] : ((mode *) (list += sizeof(mode)))[-1])
+#define va_copy(dst, src) ((dst) = (src))
+
+#endif /* __STDARG */