diff --git a/src/vmm/src/vm.rs b/src/vmm/src/vm.rs
index 4afbdaa..a60274b 100644
--- a/src/vmm/src/vm.rs
+++ b/src/vmm/src/vm.rs
@@ -191,7 +191,7 @@ impl Vm {
                     {
                         Ok(()) => {}
                         Err(_err) => {
-                            println!("Invalid Mmio write operation");
+                            println!("Invalid Mmio write operation: {:?}", req);
                             return Err(Error::InvalidMmioOperation("write"));
                         }
                     }
@@ -205,7 +205,7 @@ impl Vm {
                     {
                         Ok(()) => {}
                         Err(_err) => {
-                            println!("Invalid Mmio read operation");
+                            println!("Invalid Mmio read operation: {:?}", req);
                             return Err(Error::InvalidMmioOperation("read"));
                         }
                     }