diff --git a/plugins/eclipse/common-eclipse-util/src/EclipseProjectFinder.java b/plugins/eclipse/common-eclipse-util/src/EclipseProjectFinder.java
index 24922f0565de..9b76c6ff7014 100644
--- a/plugins/eclipse/common-eclipse-util/src/EclipseProjectFinder.java
+++ b/plugins/eclipse/common-eclipse-util/src/EclipseProjectFinder.java
@@ -23,6 +23,7 @@ package org.jetbrains.idea.eclipse;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.JDOMUtil;
 import com.intellij.openapi.util.io.FileUtil;
+import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.Processor;
 import org.jdom.Element;
 import org.jdom.JDOMException;
@@ -32,6 +33,7 @@ import org.jetbrains.annotations.Nullable;
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
+import java.util.Set;
 
 public class EclipseProjectFinder implements EclipseXml {
   public static void findModuleRoots(final List<String> paths, final String rootPath, @Nullable Processor<String> progressUpdater) {
@@ -111,6 +113,25 @@ public class EclipseProjectFinder implements EclipseXml {
     return null;
   }
 
+  public static void collectUnknownNatures(String path, Set<String> naturesNames) {
+    final File projectfile = new File(path, DOT_PROJECT_EXT);
+    try {
+      final Element natures = JDOMUtil.loadDocument(projectfile).getRootElement().getChild("natures");
+      if (natures != null) {
+        final List naturesList = natures.getChildren("nature");
+        for (Object nature : naturesList) {
+          final String natureName = ((Element)nature).getText();
+          if (!StringUtil.isEmptyOrSpaces(natureName)) {
+            naturesNames.add(natureName);
+          }
+        }
+      }
+    }
+    catch (Exception ignore) {
+    }
+    naturesNames.remove("org.eclipse.jdt.core.javanature");
+  }
+
   public static class LinkedResource {
     private String myURI;
     private String myLocation;
diff --git a/plugins/eclipse/src/org/jetbrains/idea/eclipse/importWizard/EclipseImportBuilder.java b/plugins/eclipse/src/org/jetbrains/idea/eclipse/importWizard/EclipseImportBuilder.java
index 856be2439d79..0bfebe87e442 100644
--- a/plugins/eclipse/src/org/jetbrains/idea/eclipse/importWizard/EclipseImportBuilder.java
+++ b/plugins/eclipse/src/org/jetbrains/idea/eclipse/importWizard/EclipseImportBuilder.java
@@ -15,7 +15,11 @@
  */
 package org.jetbrains.idea.eclipse.importWizard;
 
+import com.intellij.notification.Notification;
+import com.intellij.notification.NotificationType;
+import com.intellij.notification.Notifications;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.application.ModalityState;
 import com.intellij.openapi.application.ex.ApplicationInfoEx;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.fileChooser.FileChooser;
@@ -166,6 +170,7 @@ public class EclipseImportBuilder extends ProjectImportBuilder<String> implement
   public boolean validate(final Project currentProject, final Project dstProject) {
     final Ref<Exception> refEx = new Ref<Exception>();
     final HashSet<String> variables = new HashSet<String>();
+    final Set<String> naturesNames = new HashSet<String>();
     ProgressManager.getInstance().runProcessWithProgressSynchronously(new Runnable() {
       public void run() {
         try {
@@ -175,6 +180,7 @@ public class EclipseImportBuilder extends ProjectImportBuilder<String> implement
               final Element classpathElement = JDOMUtil.loadDocument(classpathfile).getRootElement();
               EclipseClasspathReader.collectVariables(variables, classpathElement, path);
             }
+            EclipseProjectFinder.collectUnknownNatures(path, naturesNames);
           }
         }
         catch (IOException e) {
@@ -195,6 +201,17 @@ public class EclipseImportBuilder extends ProjectImportBuilder<String> implement
       return false;
     }
 
+    final Runnable runnable = new Runnable() {
+      public void run() {
+        if (!naturesNames.isEmpty()) {
+          final String title = "Unknown Natures Detected";
+          Notifications.Bus.notify(new Notification(title, title, "Imported projects contain unknown natures:<br>" + StringUtil.join(naturesNames, "<br>")+ "<br>" +
+                                                                  "Some settings may be lost after import.", NotificationType.WARNING));
+        }
+      }
+    };
+    ApplicationManager.getApplication().invokeLater(runnable, ModalityState.NON_MODAL);
+
     return true;
   }