diff --git a/examples/guard_functions/src/guards.ts b/examples/guard_functions/src/guards.ts
index 773747dd91..5e2dce764c 100644
--- a/examples/guard_functions/src/guards.ts
+++ b/examples/guard_functions/src/guards.ts
@@ -42,11 +42,6 @@ export function throwCustomError() {
     );
 }
 
-export function preventUpgrades() {
-    console.log('preventUpgrades called');
-    return 'Upgrades to this canister are disabled';
-}
-
 export function returnNonStringErrValue() {
     console.log('nonStringErrValue called');
     throw { badProp: 'Something other than a string' };
diff --git a/src/lib_new/ic.ts b/src/lib_new/ic.ts
index 7fc84399b5..99af9b64de 100644
--- a/src/lib_new/ic.ts
+++ b/src/lib_new/ic.ts
@@ -564,7 +564,7 @@ export const ic: Ic = globalThis._azleIc
           },
           caller: () => {
               const callerBytes = globalThis._azleIc.caller();
-              return Principal.fromUint8Array(callerBytes);
+              return Principal.fromUint8Array(new Uint8Array(callerBytes));
           },
           candidDecode: (candidEncoded) => {
               return globalThis._azleIc.candidDecode(candidEncoded.buffer);