--- a/dom/svg/nsSVGPathGeometryElement.cpp
+++ b/dom/svg/nsSVGPathGeometryElement.cpp
@@ -82,17 +82,19 @@ nsSVGPathGeometryElement::GetOrBuildPath
   bool cacheable  = aDrawTarget.GetBackendType() ==
                       gfxPlatform::GetPlatform()->GetContentBackend();
 
   // Checking for and returning mCachedPath before checking the pref means
   // that the pref is only live on page reload (or app restart for SVG in
   // chrome). The benefit is that we avoid causing a CPU memory cache miss by
   // looking at the global variable that the pref's stored in.
   if (cacheable && mCachedPath) {
-    return mCachedPath;
+    if (aDrawTarget.GetBackendType() == mCachedPath->GetBackendType()) {
+      return mCachedPath;
+    }
   }
   RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder(aFillRule);
   RefPtr<Path> path = BuildPath(builder);
   if (cacheable && NS_SVGPathCachingEnabled()) {
     mCachedPath = path;
   }
   return path.forget();
 }