diff --git a/ChangeLog b/ChangeLog
index adcf78730c..9fd63adf7c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Jun  5 20:32:00 2013  Kenta Murata  <mrkn@cookpad.com>
+
+	* include/ruby/ruby.h: fix alignment in comment.
+
 Wed Jun  5 20:05:29 2013  Tanaka Akira  <akr@fsij.org>
 
 	* random.c (int_pair_to_real_inclusive): Add a cast to BDIGIT.
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 77fb1afa8d..7ce16ee133 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -382,7 +382,7 @@ USE_FLONUM
 ...xxxx xx10 Flonum
 ...0000 1100 Symbol
 ...0000 0000 Qfalse  0x00 =  0
-...0000 1000  Qnil   0x08 =  8
+...0000 1000 Qnil    0x08 =  8
 ...0001 0100 Qtrue   0x14 = 20
 ...0011 0100 Qundef  0x34 = 52
  */