diff --git a/arch/sim/src/sim/up_hostmemory.c b/arch/sim/src/sim/up_hostmemory.c
index 0d8ddb18d9f..c338f9a5033 100644
--- a/arch/sim/src/sim/up_hostmemory.c
+++ b/arch/sim/src/sim/up_hostmemory.c
@@ -92,6 +92,8 @@ void *host_alloc_shmem(const char *name, size_t size, int master)
       return NULL;
     }
 
+  fchown(fd, getuid(), getgid());
+
   if (!master)
     {
       /* Avoid the second slave instance open successfully */