diff --git a/pmd/src/main/resources/rulesets/releases/512.xml b/pmd/src/main/resources/rulesets/releases/512.xml
new file mode 100644
index 0000000000..79a98457d2
--- /dev/null
+++ b/pmd/src/main/resources/rulesets/releases/512.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+
+<ruleset name="512"
+    xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 http://pmd.sourceforge.net/ruleset_2_0_0.xsd">
+  <description>
+This ruleset contains links to rules that are new in PMD v5.1.2
+  </description>
+
+    <rule ref="rulesets/java/codesize.xml/StdCyclomaticComplexity"/>
+    <rule ref="rulesets/java/codesize.xml/ModifiedCyclomaticComplexity"/>
+
+</ruleset>
+
diff --git a/pmd/src/site/markdown/changelog.md b/pmd/src/site/markdown/changelog.md
index a0861329ea..8ebd92e1fd 100644
--- a/pmd/src/site/markdown/changelog.md
+++ b/pmd/src/site/markdown/changelog.md
@@ -37,4 +37,11 @@
 
 * [#41](https://github.com/pmd/pmd/pull/41): Update to use asm 5.0.2
 * [#42](https://github.com/pmd/pmd/pull/42): Add SLF4j Logger type to MoreThanOneLogger rule
+* [#43](https://github.com/pmd/pmd/pull/43): Standard and modified cyclomatic complexity
 
+**New Rules:**
+
+* Java - codesize ruleset:
+    * StdCyclomaticComplexity: Like CyclomaticComplexityRule, but not including boolean operators
+    * ModifiedCyclomaticComplexity: Like StdCyclomaticComplexity, but switch statement plus all cases count as 1
+    * Thanks to Alan Hohn
diff --git a/pmd/src/site/xdocs/credits.xml b/pmd/src/site/xdocs/credits.xml
index 6126b0f4c5..96adbd931c 100644
--- a/pmd/src/site/xdocs/credits.xml
+++ b/pmd/src/site/xdocs/credits.xml
@@ -339,6 +339,7 @@
             <li>Mat Booth - #1109 Patch to build with Javacc 5.0</li>
             <li>Stuart Turton - for PLSQL support. See also <a href="http://pldoc.sourceforge.net/">http://pldoc.sourceforge.net/</a></li>
             <li>Andrey Utis - for adding Apache Velocity as a new language and writing up a <a href="new-language.html">howto for adding new languages</a>.</li>
+            <li>Alan Hohn - for adding Standard and modified cyclomatic complexity rules</li>
         </ul>
         </subsection>
         <subsection name="Organizations">