diff --git a/plugins/spellchecker/src/com/intellij/spellchecker/settings/SpellCheckerSettingsPane.java b/plugins/spellchecker/src/com/intellij/spellchecker/settings/SpellCheckerSettingsPane.java
index a65225166b35..3ce28f5bbfcc 100644
--- a/plugins/spellchecker/src/com/intellij/spellchecker/settings/SpellCheckerSettingsPane.java
+++ b/plugins/spellchecker/src/com/intellij/spellchecker/settings/SpellCheckerSettingsPane.java
@@ -188,7 +188,7 @@ public class SpellCheckerSettingsPane implements Disposable {
   private boolean isUserDictionary(final String dictionary) {
     boolean isUserDictionary = false;
     for (String dictionaryFolder : pathsChooserComponent.getValues()) {
-      if (dictionary.startsWith(dictionaryFolder)) {
+      if (FileUtil.toSystemIndependentName(dictionary).startsWith(dictionaryFolder)) {
         isUserDictionary = true;
         break;
       }