diff --git a/reactos/include/in6addr.h b/reactos/include/in6addr.h
new file mode 100644
index 00000000000..22791980765
--- /dev/null
+++ b/reactos/include/in6addr.h
@@ -0,0 +1,19 @@
+#ifndef s6_addr
+
+typedef struct in6_addr
+{
+    union
+    {
+        UCHAR Byte[16];
+        USHORT Word[8];
+    } u;
+} IN6_ADDR, *PIN6_ADDR, FAR *LPIN6_ADDR;
+
+#define in_addr6    in6_addr
+#define _S6_un      u
+#define _S6_u8      Byte
+#define s6_addr     _S6_un._S6_u8
+#define s6_bytes    u.Byte
+#define s6_words    u.Word
+
+#endif
diff --git a/reactos/include/inaddr.h b/reactos/include/inaddr.h
new file mode 100644
index 00000000000..dd14f9fd770
--- /dev/null
+++ b/reactos/include/inaddr.h
@@ -0,0 +1,21 @@
+#ifndef s_addr
+
+typedef struct in_addr
+{
+        union
+        {
+                struct {UCHAR s_b1,s_b2,s_b3,s_b4;} S_un_b;
+                struct {USHORT s_w1,s_w2;} S_un_w;
+                ULONG S_addr;
+        } S_un;
+} IN_ADDR, *PIN_ADDR, FAR *LPIN_ADDR;
+
+#define s_addr  S_un.S_addr
+#define s_host  S_un.S_un_b.s_b2
+#define s_net   S_un.S_un_b.s_b1
+#define s_imp   S_un.S_un_w.s_w2
+#define s_impno S_un.S_un_b.s_b4
+#define s_lh    S_un.S_un_b.s_b3
+
+#endif
+