index 499be65..fe2f13f 100644
--- a/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/GenerateEclipseJdt.groovy
+++ b/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/GenerateEclipseJdt.groovy
@@ -15,6 +15,7 @@
  */
 package org.gradle.plugins.ide.eclipse
 
+import org.gradle.api.JavaVersion
 import org.gradle.internal.reflect.Instantiator
 import org.gradle.plugins.ide.api.PropertiesFileContentMerger
 import org.gradle.plugins.ide.api.PropertiesGeneratorTask
@@ -44,8 +45,8 @@ class GenerateEclipseJdt extends PropertiesGeneratorTask<Jdt> {
     protected void configure(Jdt jdtContent) {
         def jdtModel = getJdt()
         jdtModel.file.beforeMerged.execute(jdtContent)
-        jdtContent.sourceCompatibility = jdtModel.sourceCompatibility
-        jdtContent.targetCompatibility = jdtModel.targetCompatibility
+        jdtContent.sourceCompatibility = JavaVersion.toVersion(jdtModel.sourceCompatibility)
+        jdtContent.targetCompatibility = JavaVersion.toVersion(jdtModel.targetCompatibility)
         jdtModel.file.whenMerged.execute(jdtContent)
     }
 }
diff --git a/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/model/EclipseJdt.groovy b/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/model/EclipseJdt.groovy
index b6f81f1..45b6e0e 100644
--- a/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/model/EclipseJdt.groovy
+++ b/subprojects/ide/src/main/groovy/org/gradle/plugins/ide/eclipse/model/EclipseJdt.groovy
@@ -63,7 +63,8 @@ class EclipseJdt {
      * <p>
      * For example see docs for {@link EclipseJdt}
      */
-    JavaVersion sourceCompatibility
+//    JavaVersion sourceCompatibility
+     def sourceCompatibility
 
     void setSourceCompatibility(Object sourceCompatibility) {
         this.sourceCompatibility = JavaVersion.toVersion(sourceCompatibility)
@@ -74,7 +75,8 @@ class EclipseJdt {
      * <p>
      * For example see docs for {@link EclipseJdt}
      */
-    JavaVersion targetCompatibility
+//    JavaVersion targetCompatibility
+      def targetCompatibility
 
     void setTargetCompatibility(Object targetCompatibility) {
         this.targetCompatibility = JavaVersion.toVersion(targetCompatibility)