--- a/dom/svg/SVGContentUtils.cpp
+++ b/dom/svg/SVGContentUtils.cpp
@@ -194,17 +194,17 @@ SVGContentUtils::GetStrokeOptions(AutoSt
 
   aStrokeOptions->mLineWidth =
     GetStrokeWidth(aElement, styleContext, aContextPaint);
 
   aStrokeOptions->mMiterLimit = Float(styleSVG->mStrokeMiterlimit);
 
   switch (styleSVG->mStrokeLinejoin) {
   case NS_STYLE_STROKE_LINEJOIN_MITER:
-    aStrokeOptions->mLineJoin = JoinStyle::MITER;
+    aStrokeOptions->mLineJoin = JoinStyle::MITER_OR_BEVEL;
     break;
   case NS_STYLE_STROKE_LINEJOIN_ROUND:
     aStrokeOptions->mLineJoin = JoinStyle::ROUND;
     break;
   case NS_STYLE_STROKE_LINEJOIN_BEVEL:
     aStrokeOptions->mLineJoin = JoinStyle::BEVEL;
     break;
   }

--- a/layout/svg/nsSVGUtils.cpp
+++ b/layout/svg/nsSVGUtils.cpp
@@ -1502,17 +1502,17 @@ nsSVGUtils::SetupCairoStrokeGeometry(nsI
     aContext->SetLineCap(CapStyle::SQUARE);
     break;
   }
 
   aContext->SetMiterLimit(style->mStrokeMiterlimit);
 
   switch (style->mStrokeLinejoin) {
   case NS_STYLE_STROKE_LINEJOIN_MITER:
-    aContext->SetLineJoin(JoinStyle::MITER);
+    aContext->SetLineJoin(JoinStyle::MITER_OR_BEVEL);
     break;
   case NS_STYLE_STROKE_LINEJOIN_ROUND:
     aContext->SetLineJoin(JoinStyle::ROUND);
     break;
   case NS_STYLE_STROKE_LINEJOIN_BEVEL:
     aContext->SetLineJoin(JoinStyle::BEVEL);
     break;
   }