diff --git a/ChangeLog b/ChangeLog
index 9c0783a3c9..51779b94aa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,7 +7,7 @@ Thu Oct 15 01:57:03 2015  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
 
 	* test/objspace/test_objspace.rb
 	  (test_trace_object_allocations_start_stop_clear): clear object
-	  allocation table first to get rid of erronous detection for obj3.
+	  allocation table first to get rid of erroneous detection for obj3.
 	  [ruby-dev:49095] [Bug #11271]
 
 Thu Oct 15 01:53:38 2015  Benoit Daloze  <eregontp@gmail.com>
@@ -84,7 +84,7 @@ Sun Oct 11 05:29:51 2015  Koichi Sasada  <ko1@atdot.net>
 	  functions.
 
 	* vm_insnhelper.c (vm_yield_callee_setup_arg): remove this function
-	  beacuse it is only delegation function.
+	  because it is only delegation function.
 
 Sun Oct 11 03:48:46 2015  Koichi Sasada  <ko1@atdot.net>
 
@@ -203,7 +203,7 @@ Wed Oct  7 20:43:14 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 	* string.c (rb_str_resurrect): fix resurrection of short enough to
 	  be embedded but not embedded string.
 
-Wed Oct 07 20:17:29 2015  Koichi Sasada  <ko1@atdot.net>
+Wed Oct  7 20:17:29 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (newobj_of): divide fast path and slow path
 	  to avoid register savings for fast path.
diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 820edc7a20..0ac54bfb89 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -177,7 +177,7 @@ class TestObjSpace < Test::Unit::TestCase
   end
 
   def test_trace_object_allocations_start_stop_clear
-    ObjectSpace.trace_object_allocations_clear # clear object_table to get rid of erronous detection for obj3
+    ObjectSpace.trace_object_allocations_clear # clear object_table to get rid of erroneous detection for obj3
     GC.disable # suppress potential object reuse. see [Bug #11271]
     begin
       ObjectSpace.trace_object_allocations_start