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1diff --git a/third_party/ashmem/ashmem-dev.c b/third_party/ashmem/ashmem-dev.c
2index 399ea36ce3826..6bb4977bab28d 100644
3--- a/third_party/ashmem/ashmem-dev.c
4+++ b/third_party/ashmem/ashmem-dev.c
5@@ -235,7 +235,7 @@ int ashmem_get_prot_region(int fd) {
6   int result = PROT_READ;
7   const size_t page_size = (size_t)sysconf(_SC_PAGESIZE);
8   void* m = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
9-                 MAP_PRIVATE, fd, 0);
10+                 MAP_SHARED, fd, 0);
11   if (m != MAP_FAILED) {
12     munmap(m, page_size);
13     result = PROT_READ|PROT_WRITE;
14