diff --git a/common/src/lib.rs b/common/src/lib.rs
index a63b92779a..3514062143 100644
--- a/common/src/lib.rs
+++ b/common/src/lib.rs
@@ -162,6 +162,7 @@ pub enum ProxyType {
     SwapHotkey,
     SubnetLeaseBeneficiary, // Used to operate the leased subnet
     RootClaim,
+    Cancel, // For cancelling time-delayed proxy announcements
 }
 
 impl TryFrom<u8> for ProxyType {
@@ -187,6 +188,7 @@ impl TryFrom<u8> for ProxyType {
             15 => Ok(Self::SwapHotkey),
             16 => Ok(Self::SubnetLeaseBeneficiary),
             17 => Ok(Self::RootClaim),
+            18 => Ok(Self::Cancel),
             _ => Err(()),
         }
     }
@@ -213,6 +215,7 @@ impl From<ProxyType> for u8 {
             ProxyType::SwapHotkey => 15,
             ProxyType::SubnetLeaseBeneficiary => 16,
             ProxyType::RootClaim => 17,
+            ProxyType::Cancel => 18,
         }
     }
 }
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 41a00e3f64..178ffd61b2 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -779,6 +779,10 @@ impl InstanceFilter<RuntimeCall> for ProxyType {
                 c,
                 RuntimeCall::SubtensorModule(pallet_subtensor::Call::claim_root { .. })
             ),
+            ProxyType::Cancel => matches!(
+                c,
+                RuntimeCall::Proxy(pallet_proxy::Call::reject_announcement { .. })
+            ),
         }
     }
     fn is_superset(&self, o: &Self) -> bool {