diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index f4054e0923..ca933ad979 100755
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -16408,5 +16408,20 @@ Change of this parameter will affect the layout of buttons in notification toast
 		<key>Value</key>
 		<integer>1</integer>
 	</map>
+  <key>_NACL_MLFovValues</key>
+  <map>
+    <key>Comment</key>
+    <string>NaCl Fov zoom values</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Vector3</string>
+    <key>Value</key>
+    <array>
+      <real>1.047197551</real>
+      <real>1.047197551</real>
+      <real>0.0</real>
+    </array>
+  </map>  
 </map>
 </llsd>
diff --git a/indra/newview/lltoolcomp.cpp b/indra/newview/lltoolcomp.cpp
index 923fbecb1a..165e07b52e 100644
--- a/indra/newview/lltoolcomp.cpp
+++ b/indra/newview/lltoolcomp.cpp
@@ -741,9 +741,30 @@ BOOL LLToolCompGun::handleRightMouseDown(S32 x, S32 y, MASK mask)
 	*/
 
 	// Returning true will suppress the context menu
+	// NaCl - Rightclick-mousewheel zoom
+	static LLCachedControl<LLVector3> _NACL_MLFovValues(gSavedSettings,"_NACL_MLFovValues");
+	static LLCachedControl<F32> CameraAngle(gSavedSettings,"CameraAngle");
+	LLVector3 vTemp=_NACL_MLFovValues;
+	vTemp.mV[0]=CameraAngle;
+	vTemp.mV[2]=1.0f;
+	gSavedSettings.setVector3("_NACL_MLFovValues",vTemp);
+	gSavedSettings.setF32("CameraAngle",vTemp.mV[1]);
+	// NaCl End
 	return TRUE;
 }
-
+// NaCl - Rightclick-mousewheel zoom
+BOOL LLToolCompGun::handleRightMouseUp(S32 x, S32 y, MASK mask)
+{
+	static LLCachedControl<LLVector3> _NACL_MLFovValues(gSavedSettings,"_NACL_MLFovValues");
+	static LLCachedControl<F32> CameraAngle(gSavedSettings,"CameraAngle");
+	LLVector3 vTemp=_NACL_MLFovValues;
+	vTemp.mV[1]=CameraAngle;
+	vTemp.mV[2]=0.0f;
+	gSavedSettings.setVector3("_NACL_MLFovValues",vTemp);
+	gSavedSettings.setF32("CameraAngle",vTemp.mV[0]);
+	return TRUE;
+}
+// NaCl End
 
 BOOL LLToolCompGun::handleMouseUp(S32 x, S32 y, MASK mask)
 {
@@ -777,7 +798,19 @@ void	LLToolCompGun::handleDeselect()
 
 BOOL LLToolCompGun::handleScrollWheel(S32 x, S32 y, S32 clicks)
 {
-	if (clicks > 0)
+	// NaCl - Rightclick-mousewheel zoom
+	static LLCachedControl<LLVector3> _NACL_MLFovValues(gSavedSettings,"_NACL_MLFovValues");
+	static LLCachedControl<F32> CameraAngle(gSavedSettings,"CameraAngle");
+	LLVector3 vTemp=_NACL_MLFovValues;
+	vTemp.mV[1]=CameraAngle;
+	if(vTemp.mV[2] > 0.0f)
+	{
+		vTemp.mV[1]+=clicks*0.1;
+		gSavedSettings.setVector3("_NACL_MLFovValues",vTemp);
+		gSavedSettings.setF32("CameraAngle",vTemp.mV[1]);
+	}
+	else if (clicks > 0)
+	// NaCl End
 	{
 		gAgentCamera.changeCameraToDefault();
 
diff --git a/indra/newview/lltoolcomp.h b/indra/newview/lltoolcomp.h
index bbb5ed5797..3721d9086c 100644
--- a/indra/newview/lltoolcomp.h
+++ b/indra/newview/lltoolcomp.h
@@ -53,6 +53,9 @@ public:
     virtual BOOL			handleHover(S32 x, S32 y, MASK mask)			{ return mCur->handleHover( x, y, mask ); }
 	virtual BOOL			handleScrollWheel(S32 x, S32 y, S32 clicks)		{ return mCur->handleScrollWheel( x, y, clicks ); }
 	virtual BOOL			handleRightMouseDown(S32 x, S32 y, MASK mask)	{ return mCur->handleRightMouseDown( x, y, mask ); }
+	// NaCl - Rightclick-mousewheel zoom
+	virtual BOOL			handleRightMouseUp(S32 x, S32 y, MASK mask)		{ return mCur->handleRightMouseUp( x, y, mask ); }
+	// NaCl End
 
 	virtual LLViewerObject*	getEditingObject()								{ return mCur->getEditingObject(); }
 	virtual LLVector3d		getEditingPointGlobal()							{ return mCur->getEditingPointGlobal(); }
@@ -218,6 +221,9 @@ public:
 	virtual BOOL			handleMouseDown(S32 x, S32 y, MASK mask);
 	virtual BOOL			handleDoubleClick(S32 x, S32 y, MASK mask);
 	virtual BOOL			handleRightMouseDown(S32 x, S32 y, MASK mask);
+	// NaCl - Rightclick-mousewheel zoom
+	virtual BOOL			handleRightMouseUp(S32 x, S32 y, MASK mask);
+	// NaCl End
 	virtual BOOL			handleMouseUp(S32 x, S32 y, MASK mask);
 	virtual BOOL			handleScrollWheel(S32 x, S32 y, S32 clicks);
 	virtual void			onMouseCaptureLost();