diff --git a/mods/ts/rules/gdi-vehicles.yaml b/mods/ts/rules/gdi-vehicles.yaml
index 35e3dd4dfd..9dd1f4fece 100644
--- a/mods/ts/rules/gdi-vehicles.yaml
+++ b/mods/ts/rules/gdi-vehicles.yaml
@@ -39,7 +39,7 @@ APC:
 		Sequence: water
 		RequiresCondition: inwater
 	LeavesTrails:
-		RequiresCondition: !inside-tunnel
+		RequiresCondition: !inside-tunnel && inwater
 		Image: wake
 		Palette: effect
 		TerrainTypes: Water