diff --git a/include/boost/intrusive/detail/utilities.hpp b/include/boost/intrusive/detail/utilities.hpp
index 743f329..7a92449 100644
--- a/include/boost/intrusive/detail/utilities.hpp
+++ b/include/boost/intrusive/detail/utilities.hpp
@@ -506,7 +506,7 @@ inline std::size_t floor_log2 (std::size_t x)
    for(std::size_t shift = Bits >> 1; shift; shift >>= 1){
       std::size_t tmp = n >> shift;
       if (tmp)
-   	   log2 += shift, n = tmp;
+         log2 += shift, n = tmp;
    }
 
    return log2;
diff --git a/include/boost/intrusive/slist.hpp b/include/boost/intrusive/slist.hpp
index 14c614f..bab8308 100644
--- a/include/boost/intrusive/slist.hpp
+++ b/include/boost/intrusive/slist.hpp
@@ -1653,7 +1653,7 @@ class slist_impl
    private:
    void priv_splice_after(node_ptr prev_pos_n, slist_impl &x, node_ptr before_first_n, node_ptr before_last_n)
    {
-	   if (before_first_n != before_last_n && prev_pos_n != before_first_n && prev_pos_n != before_last_n)
+      if (before_first_n != before_last_n && prev_pos_n != before_first_n && prev_pos_n != before_last_n)
       {
          if(cache_last){
             if(node_traits::get_next(prev_pos_n) == this->get_end_node()){