diff --git a/vmm/src/memory_manager.rs b/vmm/src/memory_manager.rs
index 9b0955510..31519c7b2 100644
--- a/vmm/src/memory_manager.rs
+++ b/vmm/src/memory_manager.rs
@@ -519,7 +519,9 @@ impl MemoryManager {
                     let path_ptr = path.as_mut_ptr() as *mut _;
                     let fd = unsafe { libc::mkstemp(path_ptr) };
                     unsafe { libc::unlink(path_ptr) };
-                    unsafe { File::from_raw_fd(fd) }
+                    let f = unsafe { File::from_raw_fd(fd) };
+                    f.set_len(size as u64).map_err(Error::SharedFileSetLen)?;
+                    f
                 } else {
                     OpenOptions::new()
                         .read(true)
@@ -528,8 +530,6 @@ impl MemoryManager {
                         .map_err(Error::SharedFileCreate)?
                 };
 
-                f.set_len(size as u64).map_err(Error::SharedFileSetLen)?;
-
                 let mut mmap_flags = if copy_on_write {
                     libc::MAP_NORESERVE | libc::MAP_PRIVATE
                 } else {