diff --git a/virtio-devices/src/pmem.rs b/virtio-devices/src/pmem.rs
index 94f2716b6..9024bcfa2 100644
--- a/virtio-devices/src/pmem.rs
+++ b/virtio-devices/src/pmem.rs
@@ -115,7 +115,7 @@ impl Request {
             return Err(Error::UnexpectedWriteOnlyDescriptor);
         }
 
-        if desc.len() as usize != size_of::<VirtioPmemReq>() {
+        if (desc.len() as usize) < size_of::<VirtioPmemReq>() {
             return Err(Error::InvalidRequest);
         }