diff --git a/dlls/iphlpapi/iphlpapi.spec b/dlls/iphlpapi/iphlpapi.spec
index a6662c331b9..f16849276f8 100644
--- a/dlls/iphlpapi/iphlpapi.spec
+++ b/dlls/iphlpapi/iphlpapi.spec
@@ -132,8 +132,8 @@
 #@ stub GetPerTcpConnectionStats
 @ stdcall GetRTTAndHopCount( long ptr long ptr )
 #@ stub GetSessionCompartmentId
-#@ stub GetTcp6Table
-#@ stub GetTcp6Table2
+@ stdcall GetTcp6Table( ptr ptr long )
+@ stdcall GetTcp6Table2( ptr ptr long )
 #@ stub GetTcpStatisticsEx
 @ stdcall GetTcpStatistics( ptr )
 @ stub GetTcpStatsFromStack
diff --git a/dlls/iphlpapi/iphlpapi_main.c b/dlls/iphlpapi/iphlpapi_main.c
index ea759aea4cf..2a3285f10ed 100644
--- a/dlls/iphlpapi/iphlpapi_main.c
+++ b/dlls/iphlpapi/iphlpapi_main.c
@@ -2285,3 +2285,21 @@ ULONG WINAPI GetTcpTable2(PMIB_TCPTABLE2 table, PULONG size, BOOL order)
     FIXME("pTcpTable2 %p, pdwSize %p, bOrder %d: stub\n", table, size, order);
     return ERROR_NOT_SUPPORTED;
 }
+
+/******************************************************************
+ *    GetTcp6Table (IPHLPAPI.@)
+ */
+ULONG WINAPI GetTcp6Table(PMIB_TCP6TABLE table, PULONG size, BOOL order)
+{
+    FIXME("pTcp6Table %p, size %p, order %d: stub\n", table, size, order);
+    return ERROR_NOT_SUPPORTED;
+}
+
+/******************************************************************
+ *    GetTcp6Table2 (IPHLPAPI.@)
+ */
+ULONG WINAPI GetTcp6Table2(PMIB_TCP6TABLE2 table, PULONG size, BOOL order)
+{
+    FIXME("pTcp6Table2 %p, size %p, order %d: stub\n", table, size, order);
+    return ERROR_NOT_SUPPORTED;
+}
diff --git a/include/tcpmib.h b/include/tcpmib.h
index 58be3854f09..8c3efa1a921 100644
--- a/include/tcpmib.h
+++ b/include/tcpmib.h
@@ -67,6 +67,38 @@ typedef struct _MIB_TCPTABLE
     MIB_TCPROW table[1];
 } MIB_TCPTABLE, *PMIB_TCPTABLE;
 
+typedef struct _MIB_TCP6ROW {
+    MIB_TCP_STATE State;
+    IN6_ADDR LocalAddr;
+    DWORD dwLocalScopeId;
+    DWORD dwLocalPort;
+    IN6_ADDR RemoteAddr;
+    DWORD dwRemoteScopeId;
+    DWORD dwRemotePort;
+} MIB_TCP6ROW, *PMIB_TCP6ROW;
+
+typedef struct _MIB_TCP6TABLE {
+    DWORD dwNumEntries;
+    MIB_TCP6ROW table[1];
+} MIB_TCP6TABLE, *PMIB_TCP6TABLE;
+
+typedef struct _MIB_TCP6ROW2 {
+    IN6_ADDR LocalAddr;
+    DWORD dwLocalScopeId;
+    DWORD dwLocalPort;
+    IN6_ADDR RemoteAddr;
+    DWORD dwRemoteScopeId;
+    DWORD dwRemotePort;
+    MIB_TCP_STATE State;
+    DWORD dwOwningPid;
+    TCP_CONNECTION_OFFLOAD_STATE dwOffloadState;
+} MIB_TCP6ROW2, *PMIB_TCP6ROW2;
+
+typedef struct _MIB_TCP6TABLE2 {
+    DWORD dwNumEntries;
+    MIB_TCP6ROW2 table[1];
+} MIB_TCP6TABLE2, *PMIB_TCP6TABLE2;
+
 typedef struct _MIB_TCPROW_OWNER_PID
 {
     DWORD dwState;