diff --git a/mods/cnc/rules/system.yaml b/mods/cnc/rules/system.yaml
index d0c992ee6a..a5ba617ab7 100644
--- a/mods/cnc/rules/system.yaml
+++ b/mods/cnc/rules/system.yaml
@@ -167,5 +167,6 @@ CRATE:
 		CloakSound: appear1.aud
 		UncloakSound: appear1.aud
 		Effect: stealth
+		ExcludedActorTypes: e1,e2,e3,e4,e5,e6,rmbo,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10
 	RenderUnit:
 	BelowUnits: