1 files changed, 4 insertions, 4 deletions
diff --git a/zenXml/zenxml/dom.h b/zenXml/zenxml/dom.h
index 566af330..8793d5bd 100755
--- a/zenXml/zenxml/dom.h
+++ b/zenXml/zenxml/dom.h
@@ -147,10 +147,10 @@ public:
     {
     public:
         using iterator_category = std::input_iterator_tag;
-	    using value_type = T;
-	    using difference_type = std::ptrdiff_t;
-	    using pointer   = T*;
-	    using reference = T&;
+        using value_type = T;
+        using difference_type = ptrdiff_t;
+        using pointer   = T*;
+        using reference = T&;
 
         PtrIter(IterTy it) : it_(it) {}
         PtrIter(const PtrIter& other) : it_(other.it_) {}