diff --git a/src/FDM/JSBSim/FGEngine.cpp b/src/FDM/JSBSim/FGEngine.cpp
index 1baaa3d57..580f8c76a 100644
--- a/src/FDM/JSBSim/FGEngine.cpp
+++ b/src/FDM/JSBSim/FGEngine.cpp
@@ -91,6 +91,9 @@ FGEngine::FGEngine(FGFDMExec* exec)
     CylinderHeadTemp_degK(0.0),
     OilPressure_psi(0.0),
     OilTemp_degK(0.0),
+    FuelFlow_pph(0.0),
+    N1(0.0), N2(0.0), EGT_degC(0.0),
+    InletPosition(0.0), NozzlePosition(0.0),
     FDMExec(exec),
     State(FDMExec->GetState()),
     Atmosphere(FDMExec->GetAtmosphere()),