--- a/content/svg/content/src/SVGAnimatedPathSegList.cpp
+++ b/content/svg/content/src/SVGAnimatedPathSegList.cpp
@@ -65,17 +65,17 @@ SVGAnimatedPathSegList::SetBaseValueStri
   // DOMSVGPathSegList::InternalListWillChangeTo().
 
   DOMSVGPathSegList *baseValWrapper =
     DOMSVGPathSegList::GetDOMWrapperIfExists(GetBaseValKey());
   if (baseValWrapper) {
     baseValWrapper->InternalListWillChangeTo(newBaseValue);
   }
 
-  DOMSVGPathSegList *animValWrapper;
+  DOMSVGPathSegList* animValWrapper = nsnull;
   if (!IsAnimating()) {  // DOM anim val wraps our base val too!
     animValWrapper = DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
     if (animValWrapper) {
       animValWrapper->InternalListWillChangeTo(newBaseValue);
     }
   }
 
   // Only now may we modify mBaseVal!

--- a/content/svg/content/src/SVGAnimatedPointList.cpp
+++ b/content/svg/content/src/SVGAnimatedPointList.cpp
@@ -65,17 +65,17 @@ SVGAnimatedPointList::SetBaseValueString
   // DOMSVGPointList::InternalListWillChangeTo().
 
   DOMSVGPointList *baseValWrapper =
     DOMSVGPointList::GetDOMWrapperIfExists(GetBaseValKey());
   if (baseValWrapper) {
     baseValWrapper->InternalListWillChangeTo(newBaseValue);
   }
 
-  DOMSVGPointList *animValWrapper;
+  DOMSVGPointList* animValWrapper = nsnull;
   if (!IsAnimating()) {  // DOM anim val wraps our base val too!
     animValWrapper = DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
     if (animValWrapper) {
       animValWrapper->InternalListWillChangeTo(newBaseValue);
     }
   }
 
   // Only now may we modify mBaseVal!