diff --git a/engine/src/cmd/energetic.h b/engine/src/cmd/energetic.h
index 7f3870c0fd..4d0d1ad3bb 100644
--- a/engine/src/cmd/energetic.h
+++ b/engine/src/cmd/energetic.h
@@ -100,7 +100,6 @@ class Energetic {
     float warpenergy;    //short fix
     float constrained_charge_to_shields;
     bool sufficient_energy_to_recharge_shields;
-public:
 
     //fuel of this unit
     float fuel;
diff --git a/engine/src/cmd/movable.cpp b/engine/src/cmd/movable.cpp
index 7682b96a82..5c1dce7cb8 100644
--- a/engine/src/cmd/movable.cpp
+++ b/engine/src/cmd/movable.cpp
@@ -476,7 +476,7 @@ void Movable::FireEngines(const Vector &Direction /*unit vector... might default
         float FMass) {
     Energetic *energetic = dynamic_cast<Energetic*>(this);
     FMass = energetic->ExpendFuel(FMass);
-    NetForce += Direction * (FuelSpeed * FMass / GetElapsedTime());
+    NetForce += Direction * ((double)FuelSpeed * (double)FMass / GetElapsedTime());
 }
 
 //applies a force for the whole gameturn upon the center of mass