diff --git a/examples/states-xtext/language-server/io.typefox.examples.theia.states/build.gradle b/examples/states-xtext/language-server/io.typefox.examples.theia.states/build.gradle
index 04a13c7..a2703b4 100644
--- a/examples/states-xtext/language-server/io.typefox.examples.theia.states/build.gradle
+++ b/examples/states-xtext/language-server/io.typefox.examples.theia.states/build.gradle
@@ -19,7 +19,7 @@ dependencies {
 }
 
 task generateXtextLanguage(type: JavaExec) {
-	main = 'org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher'
+	mainClass = 'org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher'
 	classpath = configurations.mwe2
 	inputs.file "src/main/java/io/typefox/examples/theia/states/GenerateStates.mwe2"
 	inputs.file "src/main/java/io/typefox/examples/theia/states/States.xtext"