--- a/gfx/2d/Logging.h
+++ b/gfx/2d/Logging.h
@@ -687,17 +687,17 @@ private:
 class TreeAutoIndent
 {
 public:
   explicit TreeAutoIndent(TreeLog& aTreeLog) : mTreeLog(aTreeLog) {
     mTreeLog.IncreaseIndent();
   }
 
   TreeAutoIndent(const TreeAutoIndent& aTreeAutoIndent) :
-      TreeAutoIndent(aTreeAutoIndent.mTreeLog) {
+      mTreeLog(aTreeAutoIndent.mTreeLog) {
     mTreeLog.IncreaseIndent();
   }
 
   TreeAutoIndent& operator=(const TreeAutoIndent& aTreeAutoIndent) = delete;
 
   ~TreeAutoIndent() {
     mTreeLog.DecreaseIndent();
   }