diff --git a/vmm/src/vm.rs b/vmm/src/vm.rs
index 20c16dfdc..6b624f2bd 100644
--- a/vmm/src/vm.rs
+++ b/vmm/src/vm.rs
@@ -422,6 +422,7 @@ impl VmmOps for VmOps {
     fn pio_write(&self, addr: u64, data: &[u8]) -> hypervisor::vm::Result<()> {
         if addr == DEBUG_IOPORT as u64 && data.len() == 1 {
             self.log_debug_ioport(data[0]);
+            return Ok(());
         }
 
         if let Err(e) = self.io_bus.write(addr, data) {