diff --git a/gradle-plugin/build.gradle b/gradle-plugin/build.gradle
index 9f90ba6c3..9f34d709f 100644
--- a/gradle-plugin/build.gradle
+++ b/gradle-plugin/build.gradle
@@ -53,10 +53,11 @@ gradlePlugin {
 
 afterEvaluate {
 	signing {
+		def publicationContainer = project.extensions.findByType(PublishingExtension).publications
 		required = { isReleaseVersion && gradle.taskGraph.hasTask('publish') }
-		Publication[] publications = new Publication[publishing.publications.size() - 1]
-		publishing.publications.findAll { it.name != 'pluginMaven' }.toArray(publications)
-		sign(publications)
+		Publication[] publicationsToSign = new Publication[publicationContainer.size() - 1]
+		publicationContainer.findAll { it.name != 'pluginMaven' }.toArray(publicationsToSign)
+		sign(publicationsToSign)
 	}
 
 	publishing.publications.each { publication ->
diff --git a/gradle/grailsCentralPublishing.gradle b/gradle/grailsCentralPublishing.gradle
index c7ac1470f..c71bd202e 100644
--- a/gradle/grailsCentralPublishing.gradle
+++ b/gradle/grailsCentralPublishing.gradle
@@ -40,10 +40,12 @@ project.extensions.configure(PublishingExtension) { PublishingExtension pe ->
 }
 
 afterEvaluate {
-    def mavenPublication = project.extensions.findByType(PublishingExtension).publications.named('pluginMaven')
-    project.extensions.configure(SigningExtension) { SigningExtension se ->
+    def publicationContainer = extensions.findByType(PublishingExtension).publications
+    extensions.configure(SigningExtension) { SigningExtension se ->
         se.required = { isReleaseVersion && gradle.taskGraph.hasTask('publish') }
-        se.sign mavenPublication.get()
+        Publication[] publicationsToSign = new Publication[publicationContainer.size()]
+        publicationContainer.findAll().toArray(publicationsToSign)
+        se.sign(publicationsToSign)
     }
 }