diff --git a/src/common/StatusArg.h b/src/common/StatusArg.h
index 449734b6cca..8641d4a2d31 100644
--- a/src/common/StatusArg.h
+++ b/src/common/StatusArg.h
@@ -70,8 +70,8 @@ class Base
 		virtual void clear() noexcept { }
 		virtual void append(const StatusVector&) noexcept { }
 		virtual void prepend(const StatusVector&) noexcept { }
-		virtual void assign(const StatusVector& ex) noexcept { }
-		virtual void assign(const Exception& ex) noexcept { }
+		virtual void assign(const StatusVector&) noexcept { }
+		virtual void assign(const Exception&) noexcept { }
 		virtual ISC_STATUS copyTo(ISC_STATUS*) const noexcept { return 0; }
 		virtual void copyTo(IStatus*) const noexcept { }
 		virtual void appendTo(IStatus*) const noexcept { }