diff --git a/include/osgParticle/FluidProgram b/include/osgParticle/FluidProgram
index 9a65f88b0..ab5350440 100644
--- a/include/osgParticle/FluidProgram
+++ b/include/osgParticle/FluidProgram
@@ -65,15 +65,15 @@ namespace osgParticle
         inline const osg::Vec3& getWind() const { return _wind; }
         
         /// Set the acceleration vector.
-        inline void setAcceleration(const osg::Vec3& v) { _viscosityCoefficientcceleration = v; }
+        inline void setAcceleration(const osg::Vec3& v) { _acceleration = v; }
         
         /// Get the acceleration vector.
-        inline const osg::Vec3& getAcceleration() const { return _viscosityCoefficientcceleration; }
+        inline const osg::Vec3& getAcceleration() const { return _acceleration; }
 
         /** Set the acceleration vector to the gravity on earth (0, 0, -9.81).
             The acceleration will be multiplied by the <CODE>scale</CODE> parameter.
         */
-        inline void setToGravity(float scale = 1.0f) { _viscosityCoefficientcceleration.set(0, 0, -9.81f*scale); }
+        inline void setToGravity(float scale = 1.0f) { _acceleration.set(0, 0, -9.81f*scale); }
 
         /// Set the fluid parameters as for air (20°C temperature).
         inline void setFluidToAir()
@@ -99,7 +99,7 @@ namespace osgParticle
         
         virtual void execute(double dt);
 
-        osg::Vec3   _viscosityCoefficientcceleration;
+        osg::Vec3   _acceleration;
         float       _viscosity;
         float       _density;
         osg::Vec3   _wind;
diff --git a/src/osgParticle/FluidProgram.cpp b/src/osgParticle/FluidProgram.cpp
index 5fabb9ebd..f228c8485 100644
--- a/src/osgParticle/FluidProgram.cpp
+++ b/src/osgParticle/FluidProgram.cpp
@@ -8,7 +8,7 @@ osgParticle::FluidProgram::FluidProgram():
 
 osgParticle::FluidProgram::FluidProgram(const FluidProgram& copy, const osg::CopyOp& copyop):
     Program(copy, copyop),
-    _viscosityCoefficientcceleration(copy._viscosityCoefficientcceleration),
+    _acceleration(copy._acceleration),
     _viscosity(copy._viscosity),
     _density(copy._density),
     _wind(copy._wind),
@@ -32,7 +32,7 @@ void osgParticle::FluidProgram::execute(double dt)
             float Volume = Area*radius*four_over_three;
         
             // compute force due to gravity + boyancy of displacing the fluid that the particle is emersed in.
-            osg::Vec3 force = _viscosityCoefficientcceleration * (particle->getMass() - _density*Volume);
+            osg::Vec3 force = _acceleration * (particle->getMass() - _density*Volume);
 
             // compute force due to friction
             osg::Vec3 relative_wind = particle->getVelocity()-_wind;