diff --git a/layout/svg/nsSVGTextFrame2.cpp b/layout/svg/nsSVGTextFrame2.cpp
index ccd7c659d60f..a960cc8bcdc5 100644
--- a/layout/svg/nsSVGTextFrame2.cpp
+++ b/layout/svg/nsSVGTextFrame2.cpp
@@ -3810,9 +3810,8 @@ nsSVGTextFrame2::GetBBoxContribution(const gfxMatrix &aToBBoxUserspace,
   NS_ASSERTION(GetFirstPrincipalChild(), "must have a child frame");
 
   SVGBBox bbox;
-  nsIFrame* kid = GetFirstPrincipalChild();
-  if (kid && NS_SUBTREE_DIRTY(kid)) {
-    // Return an empty bbox if our kid's subtree is dirty. This may be called
+  if (NS_SUBTREE_DIRTY(this)) {
+    // Return an empty bbox if this frame's subtree is dirty. This may be called
     // in that situation, e.g. when we're building a display list after an
     // interrupted reflow. This can also be called during reflow before we've
     // been reflowed, e.g. if an earlier sibling is calling FinishAndStoreOverflow and