diff --git a/mods/ra/weapons/ballistics.yaml b/mods/ra/weapons/ballistics.yaml
index 7a91bc1d10..140cb414a7 100644
--- a/mods/ra/weapons/ballistics.yaml
+++ b/mods/ra/weapons/ballistics.yaml
@@ -191,6 +191,7 @@ DepthCharge:
 	Warhead@4EffWater: CreateEffect
 		Explosions: large_splash
 		ImpactSounds: h2obomb2.aud
+		ValidImpactTypes: Water, WaterHit
 	Warhead@3Eff: CreateEffect
 		Explosions: small_explosion
 		ImpactSounds: kaboom15.aud