--- a/src/ov-float.h
+++ b/src/ov-float.h
@@ -75,7 +75,7 @@
   octave_base_value *empty_clone (void) const { return new octave_matrix (); }
 
   octave_value do_index_op (const octave_value_list& idx,
-			    bool resize_ok = false);
+                            bool resize_ok = false);
 
   idx_vector index_vector (void) const { return idx_vector (scalar); }
 
@@ -226,7 +226,7 @@
   bool save_binary (std::ostream& os, bool& save_as_floats);
 
   bool load_binary (std::istream& is, bool swap, 
-		    oct_mach_info::float_format fmt);
+                    oct_mach_info::float_format fmt);
 
 #if defined (HAVE_HDF5)
   bool save_hdf5 (hid_t loc_id, const char *name, bool save_as_floats);
@@ -235,11 +235,11 @@
 #endif
 
   int write (octave_stream& os, int block_size,
-	     oct_data_conv::data_type output_type, int skip,
-	     oct_mach_info::float_format flt_fmt) const
+             oct_data_conv::data_type output_type, int skip,
+             oct_mach_info::float_format flt_fmt) const
     {
       return os.write (array_value (), block_size, output_type,
-		       skip, flt_fmt);
+                       skip, flt_fmt);
     }
 
   mxArray *as_mxArray (void) const;