diff --git a/src/util/sync/sync_signal.h b/src/util/sync/sync_signal.h
index 2b8eeb6e..e7d1ac89 100644
--- a/src/util/sync/sync_signal.h
+++ b/src/util/sync/sync_signal.h
@@ -53,7 +53,7 @@ namespace dxvk::sync {
    *
    * Simple CPU-side fence.
    */
-  class Fence : public Signal {
+  class Fence final : public Signal {
 
   public:
 
diff --git a/src/util/sync/sync_signal_win32.h b/src/util/sync/sync_signal_win32.h
index 1b839b55..e89bec86 100644
--- a/src/util/sync/sync_signal_win32.h
+++ b/src/util/sync/sync_signal_win32.h
@@ -12,7 +12,7 @@ namespace dxvk::sync {
    * CPU-side fence that also has the
    * ability to signal Win32 events.
    */
-  class Win32Fence : public Signal {
+  class Win32Fence final : public Signal {
 
   public: