diff --git a/src/os_win32.h b/src/os_win32.h
index 4643570..a98951e 100644
--- a/src/os_win32.h
+++ b/src/os_win32.h
@@ -126,6 +126,45 @@
 #ifndef IO_REPARSE_TAG_SYMLINK
 # define IO_REPARSE_TAG_SYMLINK		0xA000000C
 #endif
+#ifndef IO_REPARSE_TAG_APPEXECLINK
+# define IO_REPARSE_TAG_APPEXECLINK	0x8000001B
+#endif
+
+/*
+ * Definition of the reparse point buffer.
+ * This is usually defined in the DDK, copy the definition here to avoid
+ * adding it as a dependence only for a single structure.
+ */
+typedef struct _REPARSE_DATA_BUFFER {
+    ULONG  ReparseTag;
+    USHORT ReparseDataLength;
+    USHORT Reserved;
+    union {
+	struct {
+	    USHORT SubstituteNameOffset;
+	    USHORT SubstituteNameLength;
+	    USHORT PrintNameOffset;
+	    USHORT PrintNameLength;
+	    ULONG  Flags;
+	    WCHAR  PathBuffer[1];
+	} SymbolicLinkReparseBuffer;
+	struct {
+	    USHORT SubstituteNameOffset;
+	    USHORT SubstituteNameLength;
+	    USHORT PrintNameOffset;
+	    USHORT PrintNameLength;
+	    WCHAR  PathBuffer[1];
+	} MountPointReparseBuffer;
+	struct {
+	    UCHAR DataBuffer[1];
+	} GenericReparseBuffer;
+	struct
+	{
+	    ULONG StringCount;
+	    WCHAR StringList[1];
+	} AppExecLinkReparseBuffer;
+    } DUMMYUNIONNAME;
+} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
 
 #ifdef _MSC_VER
     // Support for __try / __except.  All versions of MSVC are