diff --git a/ChangeLog b/ChangeLog
index 970d1523a5..819565419d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov 24 10:00:10 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* lib/rubygems/installer.rb: Fix two double-word typos.
+	  [ci skip][fix GH-1108] Patch by @jwworth
+
 Tue Nov 24 09:17:02 2015  Alexander von Gluck IV  <kallisti5@unixzen.com>
 
 	* beos: Drop support for BeOS now that Haiku is stable.
diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
index efaea83187..69590c39d8 100644
--- a/lib/rubygems/installer.rb
+++ b/lib/rubygems/installer.rb
@@ -391,7 +391,7 @@ class Gem::Installer
   end
 
   ##
-  # The location of of the spec file that is installed.
+  # The location of the spec file that is installed.
   #
 
   def spec_file
@@ -399,7 +399,7 @@ class Gem::Installer
   end
 
   ##
-  # The location of of the default spec file for default gems.
+  # The location of the default spec file for default gems.
   #
 
   def default_spec_file