diff --git a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/model/DefaultExternalSourceSet.java b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/model/DefaultExternalSourceSet.java
index 5258dbdcc893..058822a0a273 100644
--- a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/model/DefaultExternalSourceSet.java
+++ b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/model/DefaultExternalSourceSet.java
@@ -19,6 +19,9 @@ public final class DefaultExternalSourceSet implements ExternalSourceSet {
   private boolean isPreview;
   private String sourceCompatibility;
   private String targetCompatibility;
+  // The jdkInstallationPath exists only for migration.
+  // Source sets are serialized with the project data nodes.
+  private String jdkInstallationPath;
   private File javaToolchainHome;
   private Collection<File> artifacts;
   private @NotNull Collection<ExternalDependency> dependencies;
@@ -80,10 +83,15 @@ public final class DefaultExternalSourceSet implements ExternalSourceSet {
 
   @Override
   public @Nullable File getJavaToolchainHome() {
+    if (jdkInstallationPath != null) {
+      javaToolchainHome = new File(jdkInstallationPath);
+      jdkInstallationPath = null;
+    }
     return javaToolchainHome;
   }
 
   public void setJavaToolchainHome(@Nullable File javaToolchainHome) {
+    this.jdkInstallationPath = null;
     this.javaToolchainHome = javaToolchainHome;
   }