diff --git a/buildSrc/src/main/groovy/io/spring/gradle/convention/CheckstylePlugin.groovy b/buildSrc/src/main/groovy/io/spring/gradle/convention/CheckstylePlugin.groovy
index 1bfbbecbdf..53a32a83c0 100644
--- a/buildSrc/src/main/groovy/io/spring/gradle/convention/CheckstylePlugin.groovy
+++ b/buildSrc/src/main/groovy/io/spring/gradle/convention/CheckstylePlugin.groovy
@@ -39,7 +39,7 @@ class CheckstylePlugin implements Plugin<Project> {
 				project.dependencies.add('checkstyle', 'io.spring.nohttp:nohttp-checkstyle:0.0.3.RELEASE')
 
 				project.checkstyle {
-					configDir = checkstyleDir
+					configDirectory = checkstyleDir
 					toolVersion = '8.21'
 				}
 			}