diff --git a/src/main/java/io/github/linwancen/plugin/show/ext/LineExt.java b/src/main/java/io/github/linwancen/plugin/show/ext/LineExt.java
index 6ae48bf..36f70c7 100644
--- a/src/main/java/io/github/linwancen/plugin/show/ext/LineExt.java
+++ b/src/main/java/io/github/linwancen/plugin/show/ext/LineExt.java
@@ -38,7 +38,7 @@ public class LineExt {
         return extDoc(keyMap, matcher, docMap, words, treeMap);
     }
 
-    private static final Pattern DICT_PATTERN = Pattern.compile("([\\w-]++) ?(NOT)? ?= ?'");
+    private static final Pattern DICT_PATTERN = Pattern.compile("([\\w-]++) ?(NOT)? ?= ?\\(? ?'");
     private static final Pattern AND_OR_PATTERN = Pattern.compile("(AND|OR) ?'");
 
     @NotNull
diff --git a/src/test/java/io/github/linwancen/plugin/show/demo/ext/cobol/demo/BASE.cbl b/src/test/java/io/github/linwancen/plugin/show/demo/ext/cobol/demo/BASE.cbl
index a01f757..70a2ce2 100644
--- a/src/test/java/io/github/linwancen/plugin/show/demo/ext/cobol/demo/BASE.cbl
+++ b/src/test/java/io/github/linwancen/plugin/show/demo/ext/cobol/demo/BASE.cbl
@@ -1,6 +1,7 @@
 
 123456  INITIALIZE HELLO-WORLD
         IF (KEY NOT = '1' AND '2') AND
+            KEY NOT = ('1' OR '2') AND
                 KEY NOT = '1' THEN
             MOVE WS-HELLO-WORLD TO HELLO-WORLD
         END IF