diff --git a/src/RumpelWalletFactory.sol b/src/RumpelWalletFactory.sol
index 468c48a..d127de5 100644
--- a/src/RumpelWalletFactory.sol
+++ b/src/RumpelWalletFactory.sol
@@ -88,6 +88,7 @@ contract RumpelWalletFactory is Ownable, Pausable {
         else if (what == "RUMPEL_MODULE") rumpelModule = data;
         else if (what == "RUMPEL_GUARD") rumpelGuard = data;
         else if (what == "INITIALIZATION_SCRIPT") initializationScript = data;
+        else if (what == "COMPATIBILITY_FALLBACK") compatibilityFallback = data;
         else revert UnrecognizedParam(what);
         emit ParamChanged(what, data);
     }
diff --git a/test/RumpelWallet.t.sol b/test/RumpelWallet.t.sol
index 9a8b684..af0be03 100644
--- a/test/RumpelWallet.t.sol
+++ b/test/RumpelWallet.t.sol
@@ -90,6 +90,7 @@ contract RumpelWalletTest is Test {
         address newScript = makeAddr("newScript");
         address newSingleton = makeAddr("newSingleton");
         address newProxyFactory = makeAddr("newProxyFactory");
+        address newCompatibilityFallback = makeAddr("newCompatibilityFallback");
 
         vm.startPrank(admin);
         rumpelWalletFactory.setParam("RUMPEL_GUARD", newGuard);
@@ -97,6 +98,7 @@ contract RumpelWalletTest is Test {
         rumpelWalletFactory.setParam("INITIALIZATION_SCRIPT", newScript);
         rumpelWalletFactory.setParam("SAFE_SINGLETON", newSingleton);
         rumpelWalletFactory.setParam("PROXY_FACTORY", newProxyFactory);
+        rumpelWalletFactory.setParam("COMPATIBILITY_FALLBACK", newCompatibilityFallback);
         vm.stopPrank();
 
         assertEq(rumpelWalletFactory.rumpelGuard(), newGuard);
@@ -104,6 +106,7 @@ contract RumpelWalletTest is Test {
         assertEq(rumpelWalletFactory.initializationScript(), newScript);
         assertEq(rumpelWalletFactory.safeSingleton(), newSingleton);
         assertEq(address(rumpelWalletFactory.proxyFactory()), newProxyFactory);
+        assertEq(rumpelWalletFactory.compatibilityFallback(), newCompatibilityFallback);
     }
 
     function testFuzz_createWalletOwners(uint256 ownersLength, uint256 threshold) public {