diff --git a/ext/date/lib/date.rb b/ext/date/lib/date.rb
index 83234f458b..4268661cb2 100644
--- a/ext/date/lib/date.rb
+++ b/ext/date/lib/date.rb
@@ -29,11 +29,11 @@ class Date
       when Infinity; return d <=> other.d
       when Numeric; return d
       else
-	begin
-	  l, r = other.coerce(self)
-	  return l <=> r
-	rescue NoMethodError
-	end
+        begin
+          l, r = other.coerce(self)
+          return l <=> r
+        rescue NoMethodError
+        end
       end
       nil
     end
@@ -42,16 +42,16 @@ class Date
       case other
       when Numeric; return -d, d
       else
-	super
+        super
       end
     end
 
     def to_f
       return 0 if @d == 0
       if @d > 0
-	Float::INFINITY
+        Float::INFINITY
       else
-	-Float::INFINITY
+        -Float::INFINITY
       end
     end