diff --git a/src/main/java/com/hankcs/hanlp/seg/common/CWSEvaluator.java b/src/main/java/com/hankcs/hanlp/seg/common/CWSEvaluator.java
index 171bd3009..096efe53b 100644
--- a/src/main/java/com/hankcs/hanlp/seg/common/CWSEvaluator.java
+++ b/src/main/java/com/hankcs/hanlp/seg/common/CWSEvaluator.java
@@ -130,7 +130,7 @@ public void compare(String gold, String pred)
                     }
                     A_cap_B_size++;
                     goldLen += wordArray[goldIndex].length();
-                    predLen += wordArray[goldIndex].length();
+                    predLen += predArray[predIndex].length();
                     goldIndex++;
                     predIndex++;
                 }