diff --git a/src/FDM/JSBSim/FGAtmosphere.cpp b/src/FDM/JSBSim/FGAtmosphere.cpp
index 717e3a4db..b8098da0b 100644
--- a/src/FDM/JSBSim/FGAtmosphere.cpp
+++ b/src/FDM/JSBSim/FGAtmosphere.cpp
@@ -277,8 +277,8 @@ void FGAtmosphere::Turbulence(void)
     Magnitude         += MagnitudeAccel*rate*State->Getdt();
 
     vDirectiondAccelDt.Normalize();
+    vDirectiondAccelDt(eX) *= vDirectiondAccelDt(eX);
     vDirectiondAccelDt(eY) *= vDirectiondAccelDt(eY);
-    vDirectiondAccelDt(eZ) *= vDirectiondAccelDt(eZ);
     vDirectionAccel += vDirectiondAccelDt*rate*TurbRate*State->Getdt();
     vDirectionAccel.Normalize();
     vDirection      += vDirectionAccel*rate*State->Getdt();