diff --git a/java/jsp-spi/src/com/intellij/psi/impl/source/jsp/JspManager.java b/java/jsp-spi/src/com/intellij/psi/impl/source/jsp/JspManager.java
index 3fb2155d4b6a..ed39d662fc97 100644
--- a/java/jsp-spi/src/com/intellij/psi/impl/source/jsp/JspManager.java
+++ b/java/jsp-spi/src/com/intellij/psi/impl/source/jsp/JspManager.java
@@ -68,6 +68,7 @@ public abstract class JspManager implements IBaseJspManager {
 
   public abstract String[] getPossibleTldUris(@NotNull Module module);
 
+  @NotNull
   public abstract Collection<XmlFile> getPossibleTldFiles(@NotNull Module module);
 
   @Nullable