diff --git a/morph/src/main/java/org/apache/lucene/morphology/analyzer/MorphologyFilter.java b/morph/src/main/java/org/apache/lucene/morphology/analyzer/MorphologyFilter.java
index fa84cd6..922e6ed 100644
--- a/morph/src/main/java/org/apache/lucene/morphology/analyzer/MorphologyFilter.java
+++ b/morph/src/main/java/org/apache/lucene/morphology/analyzer/MorphologyFilter.java
@@ -78,4 +78,9 @@ public class MorphologyFilter extends TokenFilter {
         }
     }
 
+    @Override
+    public void reset() throws IOException {
+        super.reset();
+        state = null;
+    }
 }