diff --git a/pmd/etc/changelog.txt b/pmd/etc/changelog.txt
index c269187d7d..c9167617fc 100644
--- a/pmd/etc/changelog.txt
+++ b/pmd/etc/changelog.txt
@@ -20,6 +20,7 @@ Fixed bug 1702782 - fixed false positive in UselessOperationOnImmutable when an
 Fixed bugs 1764288/1744069/1744071 - When using Type Resolution all junit test cases will notice if you're using an extended TestCase
 Fixed bug 1793215 - pmd-nicerhtml.xsl does not display line numbers
 Fixes bug 1796928 - fixed false positive in AvoidThrowingRawExceptionTypes, when a Type name is the same as a RawException.
+Fixed bug 1811506 - False - : UnusedFormalParameter (property "checkall" needs to be set)
 Fixed false negative in UnnecessaryCaseChange
 
 The Java 1.5 source code parser is now the default for testcode used in PMD's unit tests.
diff --git a/pmd/regress/test/net/sourceforge/pmd/rules/unusedcode/xml/UnusedFormalParameter.xml b/pmd/regress/test/net/sourceforge/pmd/rules/unusedcode/xml/UnusedFormalParameter.xml
index 2fccdba176..a01f1792b0 100644
--- a/pmd/regress/test/net/sourceforge/pmd/rules/unusedcode/xml/UnusedFormalParameter.xml
+++ b/pmd/regress/test/net/sourceforge/pmd/rules/unusedcode/xml/UnusedFormalParameter.xml
@@ -158,12 +158,13 @@ class Foo {
 }
      ]]></code>
     </test-code>
-    <test-code>
+    <test-code reinitializeRule="true">
 	<description>
 		<![CDATA[
 			False - !
 		]]>
 	</description>
+	<rule-property name="checkall">true</rule-property>
 	<expected-problems>1</expected-problems>
 	<code>
 	<![CDATA[