diff --git a/README.md b/README.md
index 2db588f..c0513c1 100644
--- a/README.md
+++ b/README.md
@@ -240,7 +240,7 @@ You need to include `checkstyle` as the version bundled with the `maven-checksty
 * [RegexpSingleline](#regexpsingleline) - checkstyle - disabled
 * [RegexpSinglelineJava](#regexpsinglelinejava) - checkstyle - disabled
 * [RequiredParameterForAnnotation](#requiredparameterforannotation) - sevntu - disabled
-* [RequireThis](#requirethis) - checkstyle - disabled
+* [RequireThis](#requirethis) - checkstyle - enabled
 * [ReturnBooleanFromTernary](#returnbooleanfromternary) - sevntu - enabled
 * [ReturnCount](#returncount) - checkstyle - enabled
 * [ReturnCountExtended](#returncountextended) - sevntu - disabled
@@ -1840,6 +1840,10 @@ Checks for redundant modifiers. Checks for:
 * Class constructors.
 * Nested enum definitions that are declared as static.
 
+#### [RequireThis](http://checkstyle.sourceforge.net/config_coding.html#RequireThis)
+
+Checks that references to instance fields where a parameter name overlaps are qualified by `this.`.
+
 #### [ReturnCount](http://checkstyle.sourceforge.net/config_coding.html#ReturnCount)
 
 Restricts methods to have at most 2 `return` statements in non-void methods, and at most 1 in void methods.
@@ -2766,12 +2770,6 @@ Generic rule; doesn't embody a 'quality' check.
 
 Generic rule; doesn't embody a 'quality' check.
 
-#### [RequireThis](http://checkstyle.sourceforge.net/config_coding.html#RequireThis)
-
-> TODO: enable
-
-> TODO: checkMethods = false
-
 #### [SingleLineJavadoc](http://checkstyle.sourceforge.net/config_javadoc.html#SingleLineJavadoc)
 
 I don't use single line javadoc blocks.
diff --git a/src/main/resources/net/kemitix/checkstyle.xml b/src/main/resources/net/kemitix/checkstyle.xml
index 9984251..9a2273d 100644
--- a/src/main/resources/net/kemitix/checkstyle.xml
+++ b/src/main/resources/net/kemitix/checkstyle.xml
@@ -190,6 +190,9 @@
         <module name="ParenPad"/> <!-- parentheses should have no padding spaces -->
 
         <module name="RedundantModifier"/> <!-- checks for redundant modifies (e.g. public methods in an interface) -->
+        <module name="RequireThis"> <!-- references to instance fields where parameter name overlaps use this. -->
+            <property name="checkMethods" value="false"/>
+        </module>
         <module name="ReturnCount"/> <!-- Restricts return statements to 2 per method (1 if return type is void) -->
         <module name="RightCurly"/> <!-- placement of right curly braces ('}') for code blocks at end of line -->