diff --git a/code/ryzom/client/src/net_manager.cpp b/code/ryzom/client/src/net_manager.cpp
index d2789d2b9..2d5a4e2be 100644
--- a/code/ryzom/client/src/net_manager.cpp
+++ b/code/ryzom/client/src/net_manager.cpp
@@ -1407,12 +1407,19 @@ void impulseCorrectPos(NLMISC::CBitMemStream &impulse)
 
 	if(UserEntity->mode() != MBEHAV::COMBAT_FLOAT)
 	{
-		// Compute the destination.
-		CVectorD dest = CVectorD((float)x/1000.0f, (float)y/1000.0f, (float)z/1000.0f);
-		// Update the position for the vision.
-		NetMngr.setReferencePosition(dest);
-		// Change the user poisition.
-		UserEntity->correctPos(dest);
+		if (x == 0) // Get SpeedAdjustement
+		{
+			UserEntity->setSpeedServerAdjust(-0.2f);
+		}
+		else
+		{
+			// Compute the destination.
+			CVectorD dest = CVectorD((float)x/1000.0f, (float)y/1000.0f, (float)z/1000.0f);
+			// Update the position for the vision.
+			NetMngr.setReferencePosition(dest);
+			// Change the user poisition.
+			UserEntity->correctPos(dest);
+		}
 	}
 }// impulseCorrectPos //
 
diff --git a/code/ryzom/client/src/user_entity.cpp b/code/ryzom/client/src/user_entity.cpp
index 80fccf07c..180832d7d 100644
--- a/code/ryzom/client/src/user_entity.cpp
+++ b/code/ryzom/client/src/user_entity.cpp
@@ -148,6 +148,8 @@ CUserEntity::CUserEntity()
 	_FrontVelocity		= 0.0f;
 	_LateralVelocity	= 0.0f;
 
+	_SpeedServerAdjust  = 1.0f;
+	
 	// \todo GUIGUI : do it more generic.
 	_First_Pos = false;
 
@@ -1209,7 +1211,11 @@ void CUserEntity::applyMotion(CEntityCL *target)
 			speed = CVectorD::Null;
 	}
 	else
+	{
 		speed = getVelocity()*_SpeedFactor.getValue();
+		_SpeedFactor.addFactorValue(0.005f);
+	}
+	
 	// SPEED VECTOR NULL -> NO MOVE
 	if(speed == CVectorD::Null)
 		return;
@@ -1231,6 +1237,9 @@ void CUserEntity::applyMotion(CEntityCL *target)
 	// Third Person View
 	else
 	{
+		double modif = (100.0f/(float)NetMngr.getMsPerTick());
+		clamp(modif, 0.0, 1.0);
+		speed *= modif;
 		speed += pos();
 		sint64 x = (sint64)((sint32)(speed.x * 1000.0));
 		sint64 y = (sint64)((sint32)(speed.y * 1000.0));
@@ -3483,6 +3492,7 @@ void CUserEntity::light()
 void CUserEntity::CSpeedFactor::init()
 {
 	_Value = 1.0f; // Default speed factor is 1.
+	_ServerFactor = 1.0f;
 	CInterfaceManager *IM = CInterfaceManager::getInstance ();
 	CCDBNodeLeaf *pNodeLeaf = NLGUI::CDBManager::getInstance()->getDbProp("SERVER:USER:SPEED_FACTOR", false);
 	if(pNodeLeaf)
diff --git a/code/ryzom/client/src/user_entity.h b/code/ryzom/client/src/user_entity.h
index 1b2745cdd..11501d2a0 100644
--- a/code/ryzom/client/src/user_entity.h
+++ b/code/ryzom/client/src/user_entity.h
@@ -297,6 +297,8 @@ public:
 	// get the velocity vector of the entity
 	NLMISC::CVector getVelocity() const;
 
+	inline void setSpeedServerAdjust(float speed) {_SpeedFactor.addFactorValue(speed);}
+
 	/// Check if the mount is able to run, and force walking mode if not
 	void checkMountAbleToRun();
 
@@ -497,13 +499,23 @@ protected:
 		/// Release
 		void release();
 		/// Return the speed factor.
-		float getValue() const {return _Value;}
+		float getValue() const 	{ return _Value * _ServerFactor; }
+		void setFactorValue(float value) {_ServerFactor = value;}
+		void addFactorValue(float value) {
+			_ServerFactor += value;
+			if (_ServerFactor > 1.0)
+				_ServerFactor = 1.0;
+			if (_ServerFactor < 0.1)
+				_ServerFactor = 0.1;
+		}
+
 		virtual void serial(class NLMISC::IStream &f) throw(NLMISC::EStream) {f.serial(_Value);}
 	protected:
 		/// Method called when the ping message is back.
 		virtual void update(NLMISC::ICDBNode* leaf);
 	private:
 		float _Value;
+		float _ServerFactor;
 	};
 
 	class CMountHunger
@@ -546,6 +558,8 @@ protected:
 	/// Velocity : Front and Lateral
 	float						_FrontVelocity;
 	float						_LateralVelocity;
+	/// Speed adjustement from gpms
+	float						_SpeedServerAdjust;
 	/// Head Pitch
 	double						_HeadPitch;
 	/// Height of the eyes (camera).