diff --git a/gradle/validation/validate-source-patterns.gradle b/gradle/validation/validate-source-patterns.gradle
index 1c7967ac521..da357254686 100644
--- a/gradle/validation/validate-source-patterns.gradle
+++ b/gradle/validation/validate-source-patterns.gradle
@@ -16,7 +16,8 @@ configure(rootProject) {
   task validateSourcePatterns() {
     doFirst {
       ant.taskdef(
-          resource: 'org/codehaus/groovy/antlib.xml',
+          name: "groovy",
+          class: "org.codehaus.groovy.ant.Groovy",
           classpath: configurations.checkSourceDeps.asPath)
 
       ant.groovy(src: project(":lucene").file("tools/src/groovy/check-source-patterns.groovy"))