diff --git a/platform/core-api/src/com/intellij/util/indexing/FileContent.java b/platform/core-api/src/com/intellij/util/indexing/FileContent.java
index 68a468861858..d491870151f7 100644
--- a/platform/core-api/src/com/intellij/util/indexing/FileContent.java
+++ b/platform/core-api/src/com/intellij/util/indexing/FileContent.java
@@ -39,6 +39,7 @@ public interface FileContent extends UserDataHolder {
 
   byte[] getContent();
 
+  @NotNull
   CharSequence getContentAsText();
 
   Project getProject();
diff --git a/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java b/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
index 69e3885feec9..a29935a0c049 100644
--- a/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
+++ b/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
@@ -179,6 +179,7 @@ public final class FileContentImpl extends UserDataHolderBase implements FileCon
     return myContent;
   }
 
+  @NotNull
   @Override
   public CharSequence getContentAsText() {
     if (myFileType.isBinary()) {