diff --git a/dom/svg/DOMSVGPoint.h b/dom/svg/DOMSVGPoint.h
index de27111083..389c456d40 100644
--- a/dom/svg/DOMSVGPoint.h
+++ b/dom/svg/DOMSVGPoint.h
@@ -81,7 +81,7 @@ public:
   {
     mPt.mX = aPt.x;
     mPt.mY = aPt.y;
-    NS_ASSERTION(IsFinite(mPt.mX) && IsFinite(mPt.mX),
+    NS_ASSERTION(IsFinite(mPt.mX) && IsFinite(mPt.mY),
                  "DOMSVGPoint coords are not finite");
   }