diff --git a/rules/windows/registry_event/win_portproxy_registry_key.yml b/rules/windows/registry_event/win_portproxy_registry_key.yml
index a6affc166..2559c6202 100644
--- a/rules/windows/registry_event/win_portproxy_registry_key.yml
+++ b/rules/windows/registry_event/win_portproxy_registry_key.yml
@@ -22,4 +22,5 @@ detection:
     condition: selection_registry
 falsepositives:
     - WSL2 network bridge PowerShell script used for WSL/Kubernetes/Docker (e.g. https://github.com/microsoft/WSL/issues/4150#issuecomment-504209723)
+    - Synergy Software KVM (https://symless.com/synergy)
 level: medium