--- a/src/ov-re-diag.h
+++ b/src/ov-re-diag.h
@@ -58,7 +58,7 @@
   octave_base_value *try_narrowing_conversion (void);
 
   octave_value do_index_op (const octave_value_list& idx,
-			    bool resize_ok = false);
+                            bool resize_ok = false);
 
   builtin_type_t builtin_type (void) const { return btyp_double; }
 
@@ -81,7 +81,7 @@
   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);
 
   octave_value map (unary_mapper_t umap) const;