diff --git a/include/Makefile.in b/include/Makefile.in
index 673c32f4790..36dcaadf5fb 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -266,6 +266,7 @@ SRCDIR_INCLUDES = \
 	exdispid.h \
 	fci.h \
 	fdi.h \
+	fltdefs.h \
 	gdiplus.h \
 	gdipluscolor.h \
 	gdipluscolormatrix.h \
diff --git a/include/fltdefs.h b/include/fltdefs.h
new file mode 100644
index 00000000000..393dd58615f
--- /dev/null
+++ b/include/fltdefs.h
@@ -0,0 +1,142 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the w64 mingw-runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+#ifndef _FLTDEFS_H
+#define _FLTDEFS_H
+
+typedef PVOID FILTER_HANDLE,*PFILTER_HANDLE;
+typedef PVOID INTERFACE_HANDLE,*PINTERFACE_HANDLE;
+
+#ifdef __cplusplus
+#define EXTERNCDECL EXTERN_C
+#else
+#define EXTERNCDECL
+#endif
+
+#define PFAPIENTRY EXTERNCDECL DWORD WINAPI
+
+typedef enum _GlobalFilter {
+  GF_FRAGMENTS = 2,GF_STRONGHOST = 8,GF_FRAGCACHE = 9
+} GLOBAL_FILTER,*PGLOBAL_FILTER;
+
+typedef enum _PfForwardAction {
+  PF_ACTION_FORWARD = 0,PF_ACTION_DROP
+} PFFORWARD_ACTION,*PPFFORWARD_ACTION;
+
+typedef enum _PfAddresType {
+  PF_IPV4,PF_IPV6
+} PFADDRESSTYPE,*PPFADDRESSTYPE;
+
+#define FILTER_PROTO(ProtoId) MAKELONG(MAKEWORD((ProtoId),0x00),0x00000)
+
+#define FILTER_PROTO_ANY FILTER_PROTO(0x00)
+#define FILTER_PROTO_ICMP FILTER_PROTO(0x01)
+#define FILTER_PROTO_TCP FILTER_PROTO(0x06)
+#define FILTER_PROTO_UDP FILTER_PROTO(0x11)
+
+#define FILTER_TCPUDP_PORT_ANY (WORD)0x0000
+
+#define FILTER_ICMP_TYPE_ANY (BYTE)0xff
+#define FILTER_ICMP_CODE_ANY (BYTE)0xff
+
+typedef struct _PF_FILTER_DESCRIPTOR {
+  DWORD dwFilterFlags;
+  DWORD dwRule;
+  PFADDRESSTYPE pfatType;
+  PBYTE SrcAddr;
+  PBYTE SrcMask;
+  PBYTE DstAddr;
+  PBYTE DstMask;
+  DWORD dwProtocol;
+  DWORD fLateBound;
+  WORD wSrcPort;
+  WORD wDstPort;
+  WORD wSrcPortHighRange;
+  WORD wDstPortHighRange;
+} PF_FILTER_DESCRIPTOR,*PPF_FILTER_DESCRIPTOR;
+
+typedef struct _PF_FILTER_STATS {
+  DWORD dwNumPacketsFiltered;
+  PF_FILTER_DESCRIPTOR info;
+} PF_FILTER_STATS,*PPF_FILTER_STATS;
+
+typedef struct _PF_INTERFACE_STATS {
+  PVOID pvDriverContext;
+  DWORD dwFlags;
+  DWORD dwInDrops;
+  DWORD dwOutDrops;
+  PFFORWARD_ACTION eaInAction;
+  PFFORWARD_ACTION eaOutAction;
+  DWORD dwNumInFilters;
+  DWORD dwNumOutFilters;
+  DWORD dwFrag;
+  DWORD dwSpoof;
+  DWORD dwReserved1;
+  DWORD dwReserved2;
+  LARGE_INTEGER liSYN;
+  LARGE_INTEGER liTotalLogged;
+  DWORD dwLostLogEntries;
+  PF_FILTER_STATS FilterInfo[1];
+} PF_INTERFACE_STATS,*PPF_INTERFACE_STATS;
+
+#define FILTERSIZE (sizeof(PF_FILTER_DESCRIPTOR) - (DWORD)(&((PPF_FILTER_DESCRIPTOR)0)->SrcAddr))
+
+#define FD_FLAGS_NOSYN 0x1
+
+#define FD_FLAGS_ALLFLAGS FD_FLAGS_NOSYN
+
+#define LB_SRC_ADDR_USE_SRCADDR_FLAG 0x00000001
+#define LB_SRC_ADDR_USE_DSTADDR_FLAG 0x00000002
+#define LB_DST_ADDR_USE_SRCADDR_FLAG 0x00000004
+#define LB_DST_ADDR_USE_DSTADDR_FLAG 0x00000008
+#define LB_SRC_MASK_LATE_FLAG 0x00000010
+#define LB_DST_MASK_LATE_FLAG 0x00000020
+
+typedef struct _PF_LATEBIND_INFO {
+  PBYTE SrcAddr;
+  PBYTE DstAddr;
+  PBYTE Mask;
+} PF_LATEBIND_INFO,*PPF_LATEBIND_INFO;
+
+typedef enum _PfFrameType {
+  PFFT_FILTER = 1,PFFT_FRAG = 2,PFFT_SPOOF = 3
+} PFFRAMETYPE,*PPFFRAMETYPE;
+
+typedef struct _pfLogFrame {
+  LARGE_INTEGER Timestamp;
+  PFFRAMETYPE pfeTypeOfFrame;
+  DWORD dwTotalSizeUsed;
+  DWORD dwFilterRule;
+  WORD wSizeOfAdditionalData;
+  WORD wSizeOfIpHeader;
+  DWORD dwInterfaceName;
+  DWORD dwIPIndex;
+  BYTE bPacketData[1];
+} PFLOGFRAME,*PPFLOGFRAME;
+
+#define ERROR_BASE 23000
+
+#define PFERROR_NO_PF_INTERFACE (ERROR_BASE + 0)
+#define PFERROR_NO_FILTERS_GIVEN (ERROR_BASE + 1)
+#define PFERROR_BUFFER_TOO_SMALL (ERROR_BASE + 2)
+#define ERROR_IPV6_NOT_IMPLEMENTED (ERROR_BASE + 3)
+
+PFAPIENTRY PfCreateInterface(DWORD dwName,PFFORWARD_ACTION inAction,PFFORWARD_ACTION outAction,BOOL bUseLog,BOOL bMustBeUnique,INTERFACE_HANDLE *ppInterface);
+PFAPIENTRY PfDeleteInterface(INTERFACE_HANDLE pInterface);
+PFAPIENTRY PfAddFiltersToInterface(INTERFACE_HANDLE ih,DWORD cInFilters,PPF_FILTER_DESCRIPTOR pfiltIn,DWORD cOutFilters,PPF_FILTER_DESCRIPTOR pfiltOut,PFILTER_HANDLE pfHandle);
+PFAPIENTRY PfRemoveFiltersFromInterface(INTERFACE_HANDLE ih,DWORD cInFilters,PPF_FILTER_DESCRIPTOR pfiltIn,DWORD cOutFilters,PPF_FILTER_DESCRIPTOR pfiltOut);
+PFAPIENTRY PfRemoveFilterHandles(INTERFACE_HANDLE pInterface,DWORD cFilters,PFILTER_HANDLE pvHandles);
+PFAPIENTRY PfUnBindInterface(INTERFACE_HANDLE pInterface);
+PFAPIENTRY PfBindInterfaceToIndex(INTERFACE_HANDLE pInterface,DWORD dwIndex,PFADDRESSTYPE pfatLinkType,PBYTE LinkIPAddress);
+PFAPIENTRY PfBindInterfaceToIPAddress(INTERFACE_HANDLE pInterface,PFADDRESSTYPE pfatType,PBYTE IPAddress);
+PFAPIENTRY PfRebindFilters(INTERFACE_HANDLE pInterface,PPF_LATEBIND_INFO pLateBindInfo);
+PFAPIENTRY PfAddGlobalFilterToInterface(INTERFACE_HANDLE pInterface,GLOBAL_FILTER gfFilter);
+PFAPIENTRY PfRemoveGlobalFilterFromInterface(INTERFACE_HANDLE pInterface,GLOBAL_FILTER gfFilter);
+PFAPIENTRY PfMakeLog(HANDLE hEvent);
+PFAPIENTRY PfSetLogBuffer(PBYTE pbBuffer,DWORD dwSize,DWORD dwThreshold,DWORD dwEntries,PDWORD pdwLoggedEntries,PDWORD pdwLostEntries,PDWORD pdwSizeUsed);
+PFAPIENTRY PfDeleteLog(VOID);
+PFAPIENTRY PfGetInterfaceStatistics(INTERFACE_HANDLE pInterface,PPF_INTERFACE_STATS ppfStats,PDWORD pdwBufferSize,BOOL fResetCounters);
+PFAPIENTRY PfTestPacket(INTERFACE_HANDLE pInInterface,INTERFACE_HANDLE pOutInterface,DWORD cBytes,PBYTE pbPacket,PPFFORWARD_ACTION ppAction);
+#endif