diff --git a/java/java-psi-api/src/com/intellij/psi/PsiPrimitiveType.java b/java/java-psi-api/src/com/intellij/psi/PsiPrimitiveType.java
index a2d3e817c218..50d378c78ba3 100644
--- a/java/java-psi-api/src/com/intellij/psi/PsiPrimitiveType.java
+++ b/java/java-psi-api/src/com/intellij/psi/PsiPrimitiveType.java
@@ -126,7 +126,7 @@ public class PsiPrimitiveType extends PsiType.Stub {
   public static PsiPrimitiveType getUnboxedType(PsiType type) {
     if (!(type instanceof PsiClassType)) return null;
 
-    assert type.isValid() : type;
+    PsiUtil.ensureValidType(type);
     LanguageLevel languageLevel = ((PsiClassType)type).getLanguageLevel();
     if (!languageLevel.isAtLeast(LanguageLevel.JDK_1_5)) return null;