diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index 0cbfa23092d8..d83b537616e1 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -4037,7 +4037,7 @@ nsDisplayTransform::FrameTransformProperties::FrameTransformProperties(const nsI
                                                                        const nsRect* aBoundsOverride)
   : mFrame(aFrame)
   , mTransformList(aFrame->StyleDisplay()->mSpecifiedTransform)
-  , mToMozOrigin(GetDeltaToMozTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride))
+  , mToTransformOrigin(GetDeltaToMozTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride))
   , mToPerspectiveOrigin(GetDeltaToMozPerspectiveOrigin(aFrame, aAppUnitsPerPixel))
   , mChildPerspective(0)
 {
@@ -4147,7 +4147,7 @@ nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProp
     /* At the point when perspective is applied, we have been translated to the transform origin.
      * The translation to the perspective origin is the difference between these values.
      */
-    result = result * nsLayoutUtils::ChangeMatrixBasis(aProperties.mToPerspectiveOrigin - aProperties.mToMozOrigin, perspective);
+    result = result * nsLayoutUtils::ChangeMatrixBasis(aProperties.mToPerspectiveOrigin - aProperties.mToTransformOrigin, perspective);
   }
 
   gfxPoint3D rounded(hasSVGTransforms ? newOrigin.x : NS_round(newOrigin.x),
@@ -4167,11 +4167,11 @@ nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProp
         GetResultingTransformMatrixInternal(props,
                                             aOrigin - frame->GetPosition(),
                                             aAppUnitsPerPixel, nullptr, aOutAncestor);
-      return nsLayoutUtils::ChangeMatrixBasis(rounded + aProperties.mToMozOrigin, result) * parent;
+      return nsLayoutUtils::ChangeMatrixBasis(rounded + aProperties.mToTransformOrigin, result) * parent;
   }
 
   return nsLayoutUtils::ChangeMatrixBasis
-    (rounded + aProperties.mToMozOrigin, result);
+    (rounded + aProperties.mToTransformOrigin, result);
 }
 
 bool
diff --git a/layout/base/nsDisplayList.h b/layout/base/nsDisplayList.h
index cc3cb2d93898..67e875e994fa 100644
--- a/layout/base/nsDisplayList.h
+++ b/layout/base/nsDisplayList.h
@@ -3036,19 +3036,19 @@ public:
                              float aAppUnitsPerPixel,
                              const nsRect* aBoundsOverride);
     FrameTransformProperties(const nsCSSValueList* aTransformList,
-                             const gfxPoint3D& aToMozOrigin,
+                             const gfxPoint3D& aToTransformOrigin,
                              const gfxPoint3D& aToPerspectiveOrigin,
                              nscoord aChildPerspective)
       : mFrame(nullptr)
       , mTransformList(aTransformList)
-      , mToMozOrigin(aToMozOrigin)
+      , mToTransformOrigin(aToTransformOrigin)
       , mToPerspectiveOrigin(aToPerspectiveOrigin)
       , mChildPerspective(aChildPerspective)
     {}
 
     const nsIFrame* mFrame;
     const nsCSSValueList* mTransformList;
-    const gfxPoint3D mToMozOrigin;
+    const gfxPoint3D mToTransformOrigin;
     const gfxPoint3D mToPerspectiveOrigin;
     nscoord mChildPerspective;
   };