diff --git a/libmango/include/mango/types.h b/libmango/include/mango/types.h
index bea455f..c766801 100644
--- a/libmango/include/mango/types.h
+++ b/libmango/include/mango/types.h
@@ -28,6 +28,19 @@
 #define KERN_CFG_INVALID                   0x00u
 #define KERN_CFG_PAGE_SIZE                 0x01u
 
+#define IOVEC(p, len)                                                          \
+	{                                                                      \
+		.io_base = (virt_addr_t)(p),                                   \
+		.io_len = (len),                                               \
+	}
+#define MSG(data, data_count, handles, handles_len)                            \
+	{                                                                      \
+		.msg_data = (data),                                            \
+		.msg_data_count = (data_count),                                \
+		.msg_handles = (handles),                                      \
+		.msg_handles_count = (handles_len),                            \
+	}
+
 typedef uintptr_t phys_addr_t;
 typedef uintptr_t virt_addr_t;
 typedef uint64_t msgid_t;