1 files changed, 3 insertions, 0 deletions
diff --git a/src/main/java/org/junit/validator/AnnotationValidatorFactory.java b/src/main/java/org/junit/validator/AnnotationValidatorFactory.java
index fb2460d..7309fdd 100644
--- a/src/main/java/org/junit/validator/AnnotationValidatorFactory.java
+++ b/src/main/java/org/junit/validator/AnnotationValidatorFactory.java
@@ -27,6 +27,9 @@ public class AnnotationValidatorFactory {
         }
 
         Class<? extends AnnotationValidator> clazz = validateWithAnnotation.value();
+        if (clazz == null) {
+            throw new IllegalArgumentException("Can't create validator, value is null in annotation " + validateWithAnnotation.getClass().getName());
+        }
         try {
             AnnotationValidator annotationValidator = clazz.newInstance();
             VALIDATORS_FOR_ANNOTATION_TYPES.putIfAbsent(validateWithAnnotation, annotationValidator);