diff --git a/platform/core-api/src/com/intellij/psi/PsiDocumentManager.java b/platform/core-api/src/com/intellij/psi/PsiDocumentManager.java
index f31778d64f97..0973bca9e97d 100644
--- a/platform/core-api/src/com/intellij/psi/PsiDocumentManager.java
+++ b/platform/core-api/src/com/intellij/psi/PsiDocumentManager.java
@@ -72,6 +72,7 @@ public abstract class PsiDocumentManager {
    * @param file the file for which the document is requested.
    * @return the document instance, or <code>null</code> if the file is binary or has no associated document.
    */
+  @Nullable
   public abstract Document getDocument(@NotNull PsiFile file);
 
   /**
diff --git a/platform/lang-impl/src/com/intellij/psi/impl/PsiDocumentManagerImpl.java b/platform/lang-impl/src/com/intellij/psi/impl/PsiDocumentManagerImpl.java
index d8f47c2a1947..9e3734e9de52 100644
--- a/platform/lang-impl/src/com/intellij/psi/impl/PsiDocumentManagerImpl.java
+++ b/platform/lang-impl/src/com/intellij/psi/impl/PsiDocumentManagerImpl.java
@@ -203,6 +203,7 @@ public class PsiDocumentManagerImpl extends PsiDocumentManager implements Projec
     return ((PsiManagerEx)myPsiManager).getFileManager().findFile(virtualFile);
   }
 
+  @Nullable
   @Override
   public Document getDocument(@NotNull PsiFile file) {
     if (file instanceof PsiBinaryFile) return null;