diff --git a/mods/cnc/rules/defaults.yaml b/mods/cnc/rules/defaults.yaml
index f8f978ca58..751e5b4014 100644
--- a/mods/cnc/rules/defaults.yaml
+++ b/mods/cnc/rules/defaults.yaml
@@ -415,6 +415,7 @@
 	Sellable:
 	Guardable:
 	BodyOrientation:
+	FrozenUnderFog:
 
 ^Tree:
 	Tooltip:
diff --git a/mods/ra/rules/defaults.yaml b/mods/ra/rules/defaults.yaml
index d388dd4225..f1dc99b41c 100644
--- a/mods/ra/rules/defaults.yaml
+++ b/mods/ra/rules/defaults.yaml
@@ -272,6 +272,7 @@
 	UpdatesPlayerStatistics:
 	Guardable:
 	BodyOrientation:
+	FrozenUnderFog:
 
 ^TechBuilding:
 	Inherits: ^Building