diff --git a/java/java-psi-api/src/com/intellij/lang/java/JavaLanguage.java b/java/java-psi-api/src/com/intellij/lang/java/JavaLanguage.java
index 05297d29081d..cbd240b2ac3b 100644
--- a/java/java-psi-api/src/com/intellij/lang/java/JavaLanguage.java
+++ b/java/java-psi-api/src/com/intellij/lang/java/JavaLanguage.java
@@ -23,6 +23,7 @@ import org.jetbrains.annotations.NotNull;
  */
 public class JavaLanguage extends Language {
 
+  @NotNull
   public static final JavaLanguage INSTANCE = new JavaLanguage();
 
   private JavaLanguage() {