diff --git a/src/FDM/YASim/Model.cpp b/src/FDM/YASim/Model.cpp
index 3062986e0..d3ef8e95b 100644
--- a/src/FDM/YASim/Model.cpp
+++ b/src/FDM/YASim/Model.cpp
@@ -203,11 +203,6 @@ void Model::setGroundEffect(const float* pos, float span, float mul)
     _groundEffect = mul;
 }
 
-void Model::setStandardAtmosphere(float altitude)
-{
-    _atmo.setStandard(altitude);
-}
-
 void Model::updateGround(State* s)
 {
     float dummy[3];
diff --git a/src/FDM/YASim/Model.hpp b/src/FDM/YASim/Model.hpp
index eee142c22..00755b44d 100644
--- a/src/FDM/YASim/Model.hpp
+++ b/src/FDM/YASim/Model.hpp
@@ -70,7 +70,7 @@ public:
     void setGroundEffect(const float* pos, float span, float mul);
     void setWind(float* wind) { Math::set3(wind, _wind); }
     void setAtmosphere(Atmosphere a) { _atmo = a; };
-    void setStandardAtmosphere(float altitude);
+    void setStandardAtmosphere(float altitude) { _atmo.setStandard(altitude); };
 
     void updateGround(State* s);