diff --git a/rts/Sim/Weapons/LightningCannon.cpp b/rts/Sim/Weapons/LightningCannon.cpp
index a16ab2142b4..5e0f2d630ce 100644
--- a/rts/Sim/Weapons/LightningCannon.cpp
+++ b/rts/Sim/Weapons/LightningCannon.cpp
@@ -27,6 +27,10 @@ CLightningCannon::CLightningCannon(CUnit* owner, const WeaponDef* def)
 {
 }
 
+float CLightningCannon::GetPredictedImpactTime(float3 p) const
+{
+	return 0;
+}
 
 void CLightningCannon::FireImpl(const bool scriptCall)
 {
diff --git a/rts/Sim/Weapons/LightningCannon.h b/rts/Sim/Weapons/LightningCannon.h
index d871f49fba0..1bba4d732d5 100644
--- a/rts/Sim/Weapons/LightningCannon.h
+++ b/rts/Sim/Weapons/LightningCannon.h
@@ -13,6 +13,7 @@ class CLightningCannon: public CWeapon
 
 private:
 	void FireImpl(const bool scriptCall) override final;
+	float GetPredictedImpactTime(float3 p) const override final;
 
 private:
 	float3 color;