diff --git a/common/hooklib/path.c b/common/hooklib/path.c
index 3e43fed..e3e4ae5 100644
--- a/common/hooklib/path.c
+++ b/common/hooklib/path.c
@@ -2,7 +2,6 @@
 
 #include <assert.h>
 #include <stdbool.h>
-#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -12,7 +11,6 @@
 
 #include "hooklib/path.h"
 
-#include <ntdef.h>
 #include <winioctl.h>
 #include <util/dprintf.h>
 
@@ -1810,7 +1808,7 @@ static BOOL WINAPI hook_DeviceIoControl(
         return FALSE;
     }
 
-    REPARSE_DATA_BUFFER* mount = lpInBuffer;
+    REPARSE_DATA_BUFFER* mount = (REPARSE_DATA_BUFFER*)lpInBuffer;
 
     wchar_t *trans;
     wchar_t *src;
diff --git a/common/hooklib/path.h b/common/hooklib/path.h
index aca9356..3508d0b 100644
--- a/common/hooklib/path.h
+++ b/common/hooklib/path.h
@@ -22,3 +22,35 @@ static inline bool path_is_separator_w(wchar_t c)
 {
     return c == L'\\' || c == L'/';
 }
+
+// This is only defined in the Windows Driver SDK, so we copy the definition in here
+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;
+    };
+} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
\ No newline at end of file