diff --git a/libs/hyp/src/error.rs b/libs/hyp/src/error.rs
index b8498ca..3fdad70 100644
--- a/libs/hyp/src/error.rs
+++ b/libs/hyp/src/error.rs
@@ -26,7 +26,7 @@
 #[derive(Debug, Clone)]
 pub enum Error {
     /// MMIO guard is not supported.
-    MmioGuardNotsupported,
+    MmioGuardNotSupported,
     /// Failed to invoke a certain KVM HVC function.
     KvmError(KvmError, u32),
     /// Failed to invoke GenieZone HVC function.
@@ -40,7 +40,7 @@
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
-            Self::MmioGuardNotsupported => write!(f, "MMIO guard is not supported"),
+            Self::MmioGuardNotSupported => write!(f, "MMIO guard is not supported"),
             Self::KvmError(e, function_id) => {
                 write!(f, "Failed to invoke the HVC function with function ID {function_id}: {e}")
             }
diff --git a/libs/hyp/src/hypervisor/geniezone.rs b/libs/hyp/src/hypervisor/geniezone.rs
index 24eb89e..513e144 100644
--- a/libs/hyp/src/hypervisor/geniezone.rs
+++ b/libs/hyp/src/hypervisor/geniezone.rs
@@ -153,8 +153,9 @@
     let args = [0u64; 17];
     match success_or_error_64(hvc64(VENDOR_HYP_GZVM_MMIO_GUARD_ENROLL_FUNC_ID, args)[0]) {
         Ok(_) => Ok(()),
-        Err(GeniezoneError::NotSupported) => Err(Error::MmioGuardNotsupported),
-        Err(GeniezoneError::NotRequired) => Err(Error::MmioGuardNotsupported),
+        Err(GeniezoneError::NotSupported) | Err(GeniezoneError::NotRequired) => {
+            Err(Error::MmioGuardNotSupported)
+        }
         Err(e) => Err(Error::GeniezoneError(e, VENDOR_HYP_GZVM_MMIO_GUARD_ENROLL_FUNC_ID)),
     }
 }
diff --git a/libs/hyp/src/hypervisor/kvm.rs b/libs/hyp/src/hypervisor/kvm.rs
index a95b8de..36c53eb 100644
--- a/libs/hyp/src/hypervisor/kvm.rs
+++ b/libs/hyp/src/hypervisor/kvm.rs
@@ -160,7 +160,7 @@
     let args = [0u64; 17];
     match success_or_error_64(hvc64(VENDOR_HYP_KVM_MMIO_GUARD_ENROLL_FUNC_ID, args)[0]) {
         Ok(_) => Ok(()),
-        Err(KvmError::NotSupported) => Err(Error::MmioGuardNotsupported),
+        Err(KvmError::NotSupported) => Err(Error::MmioGuardNotSupported),
         Err(e) => Err(Error::KvmError(e, VENDOR_HYP_KVM_MMIO_GUARD_ENROLL_FUNC_ID)),
     }
 }