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-rw-r--r--src/common/compat.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/common/compat.c b/src/common/compat.c
index a55a7e9d4e..a15d09367d 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -199,8 +199,8 @@ tor_mmap_file(const char *filename)
res->mmap_handle = NULL;
res->file_handle = CreateFile(filename,
- GENERIC_READ,
- 0, NULL,
+ GENERIC_READ, FILE_SHARE_READ,
+ NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);