diff --git a/scripts/base/protocols/dce-rpc/main.bro b/scripts/base/protocols/dce-rpc/main.bro
index 600f00ac71..0b555463e0 100644
--- a/scripts/base/protocols/dce-rpc/main.bro
+++ b/scripts/base/protocols/dce-rpc/main.bro
@@ -26,7 +26,7 @@ export {
 	};
 
 	const ignored_operations: table[string] of set[string] = {
-		["winreg"] = set("BaseRegCloseKey", "BaseRegGetVersion", "BaseRegOpenKey", "BaseRegQueryValue", "BaseRegDeleteKeyEx", "OpenLocalMachine", "BaseRegEnumKey"),
+		["winreg"] = set("BaseRegCloseKey", "BaseRegGetVersion", "BaseRegOpenKey", "BaseRegQueryValue", "BaseRegDeleteKeyEx", "OpenLocalMachine", "BaseRegEnumKey", "OpenClassesRoot"),
 		["spoolss"] = set("RpcSplOpenPrinter", "RpcClosePrinter"),
 		["wkssvc"] = set("NetrWkstaGetInfo"),
 	} &redef;