diff --git a/ruby-2.6.0-rdoc-6.0.1-fix-template-typo.patch b/ruby-2.6.0-rdoc-6.0.1-fix-template-typo.patch
new file mode 100644
index 0000000..e108270
--- /dev/null
+++ b/ruby-2.6.0-rdoc-6.0.1-fix-template-typo.patch
@@ -0,0 +1,34 @@
+From d05e6269d4a4dfd701f5ddb3ae34306cba891511 Mon Sep 17 00:00:00 2001
+From: Jun Aruga <jaruga@redhat.com>
+Date: Fri, 3 Aug 2018 11:35:55 +0200
+Subject: [PATCH] Fix indent and typo from moveTimout to moveTimeout.
+
+---
+ lib/rdoc/generator/template/json_index/js/navigation.js | 7 +++----
+ 1 file changed, 3 insertions(+), 4 deletions(-)
+
+diff --git a/lib/rdoc/generator/template/json_index/js/navigation.js b/lib/rdoc/generator/template/json_index/js/navigation.js
+index e4126812..43c5118a 100644
+--- a/lib/rdoc/generator/template/json_index/js/navigation.js
++++ b/lib/rdoc/generator/template/json_index/js/navigation.js
+@@ -59,9 +59,8 @@ Navigation = new function() {
+         }
+         break;
+       case 13: //Event.KEY_RETURN:
+-        if (this.$current)
+-          e.preventDefault();
+-          this.select(this.$current);
++        if (this.$current) e.preventDefault();
++        this.select(this.$current);
+         break;
+     }
+     if (e.ctrlKey && e.shiftKey) this.select(this.$current);
+@@ -80,7 +79,7 @@ Navigation = new function() {
+     var go = function() {
+       if (!_this.moveTimeout) return;
+       _this[isDown ? 'moveDown' : 'moveUp']();
+-      _this.moveTimout = setTimeout(go, 100);
++      _this.moveTimeout = setTimeout(go, 100);
+     }
+     this.moveTimeout = setTimeout(go, 200);
+   }
diff --git a/ruby.spec b/ruby.spec
index 4033ddd..e1f6690 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -21,7 +21,7 @@
 %endif
 
 
-%global release 97
+%global release 99
 %{!?release_string:%global release_string %{?development_release:0.}%{release}%{?development_release:.%{development_release}}%{?dist}}
 
 # The RubyGems library has to stay out of Ruby directory three, since the
@@ -145,6 +145,9 @@ Patch15: ruby-2.6.0-library-options-to-MAINLIBS.patch
 # Do not require C++ compiler.
 # https://github.com/rubygems/rubygems/pull/2367
 Patch16: ruby-2.5.1-Avoid-need-of-C++-compiler-to-pass-the-test-suite.patch
+# https://github.com/ruby/rdoc/commit/d05e6269d4a4dfd701f5ddb3ae34306cba891511
+Patch20: ruby-2.6.0-rdoc-6.0.1-fix-template-typo.patch
+
 # Fix some OpenSSL 1.1.1 test failures.
 # https://github.com/ruby/openssl/pull/202
 Patch17: ruby-2.5.1-Test-fixes-for-OpenSSL-1.1.1.patch
@@ -540,6 +543,7 @@ rm -rf ext/fiddle/libffi*
 %patch17 -p1
 %patch18 -p1
 %patch19 -p1
+%patch20 -p1
 
 # Provide an example of usage of the tapset:
 cp -a %{SOURCE3} .
@@ -1093,6 +1097,11 @@ OPENSSL_SYSTEM_CIPHERS_OVERRIDE=xyz_nonexistent_file OPENSSL_CONF='' \
 %{gem_dir}/specifications/xmlrpc-%{xmlrpc_version}.gemspec
 
 %changelog
+* Tue Aug 28 2018 Jun Aruga <jaruga@redhat.com> - 2.5.1-99
+- Fix generated rdoc template issues.
+  * ruby-2.6.0-rdoc-6.0.1-fix-template-typo.patch
+  Resolves: rhbz#1612026
+
 * Mon Aug 13 2018 Vít Ondruch <vondruch@redhat.com> - 2.5.1-97
 - Fix TLS 1.3 issues.
   * ruby-2.6.0-fix-test-failure-with-TLS-1.3.patch