1 files changed, 11 insertions, 5 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 06da37040..f34ea1102 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -488,9 +488,14 @@ static uid_t file_owner(HANDLE fh)
         uid_t uid = 0;
         DWORD *ptr;
         unsigned char prefix[] = {
-                        0x01, 0x05, 0x00, 0x00,
-                        0x00, 0x00, 0x00, 0x05,
-                        0x15, 0x00, 0x00, 0x00
+                0x01, 0x05, 0x00, 0x00,
+                0x00, 0x00, 0x00, 0x05,
+                0x15, 0x00, 0x00, 0x00
+        };
+        unsigned char nullsid[] = {
+                0x01, 0x01, 0x00, 0x00,
+                0x00, 0x00, 0x00, 0x01,
+                0x00, 0x00, 0x00, 0x00
         };
 
         /*  get SID of current user */
@@ -520,8 +525,9 @@ static uid_t file_owner(HANDLE fh)
 
         if (EqualSid(pSidOwner, user->User.Sid)) {
                 uid = DEFAULT_UID;
-        }
-        else if (memcmp(pSidOwner, prefix, sizeof(prefix)) == 0) {
+        } else if (memcmp(pSidOwner, nullsid, sizeof(nullsid)) == 0) {
+                uid = DEFAULT_UID;
+        } else if (memcmp(pSidOwner, prefix, sizeof(prefix)) == 0) {
                 /* for local or domain users use the RID as uid */
                 ptr = (DWORD *)pSidOwner;
                 if (ptr[6] >= 500 && ptr[6] < DEFAULT_UID)