diff --git a/src/Vm.sol b/src/Vm.sol
index c6aed005..53b26e8c 100644
--- a/src/Vm.sol
+++ b/src/Vm.sol
@@ -540,6 +540,9 @@ interface Vm is VmSafe {
     // Sets an address' code
     function etch(address target, bytes calldata newRuntimeBytecode) external;
 
+    // Load a genesis JSON file's `allocs` into the in-memory state.
+    function loadAllocs(string calldata pathToAllocsJson) external;
+
     // Resets the nonce of an account to 0 for EOAs and 1 for contract accounts
     function resetNonce(address account) external;
 
diff --git a/test/Vm.t.sol b/test/Vm.t.sol
index 3c1d73f1..c4a15fe9 100644
--- a/test/Vm.t.sol
+++ b/test/Vm.t.sol
@@ -10,6 +10,6 @@ contract VmTest is Test {
     // added to or removed from Vm or VmSafe.
     function test_interfaceId() public {
         assertEq(type(VmSafe).interfaceId, bytes4(0x329f5e71), "VmSafe");
-        assertEq(type(Vm).interfaceId, bytes4(0x82ccbb14), "Vm");
+        assertEq(type(Vm).interfaceId, bytes4(0x316cedc3), "Vm");
     }
 }