diff --git a/History.txt b/History.txt
index d4c1cc1c..cf95fcb9 100644
--- a/History.txt
+++ b/History.txt
@@ -6,6 +6,7 @@
   * Upgraded RubyGems to 1.8.24 on all versions of Ruby
   * Upgraded OpenSSL to version 1.0.0i
   * Upgraded libffi to version 3.0.11
+  * Disable extra debug information from Ruby 1.9 builds (debugflags)
 
 === 2012-04-21
 
diff --git a/config/ruby_installer.rb b/config/ruby_installer.rb
index 71ef6c8c..e8f87bb9 100755
--- a/config/ruby_installer.rb
+++ b/config/ruby_installer.rb
@@ -67,6 +67,7 @@ module RubyInstaller
       :configure_options => [
         '--enable-shared',
         '--disable-install-doc',
+        'debugflags=-g'
         "CPPFLAGS='-DFD_SETSIZE=32767'"
       ],
       :files => [