diff --git a/BUILD.tf_dist b/BUILD.tf_dist
index 3bda660..cec3a54 100644
--- a/BUILD.tf_dist
+++ b/BUILD.tf_dist
@@ -17,7 +17,8 @@ filegroup(
 filegroup(
    name="tf_mac_lib",
    srcs=glob(
-   ["lib/mac/*.o"]
+   ["lib/mac/*.o"],
+   exclude = ["lib/mac/__.SYMDEF_*.o"]
    )
 )
 cc_library(
diff --git a/kcws/cc/sentence_breaker.cc b/kcws/cc/sentence_breaker.cc
index d7590c3..10ef525 100755
--- a/kcws/cc/sentence_breaker.cc
+++ b/kcws/cc/sentence_breaker.cc
@@ -25,6 +25,8 @@ SentenceBreaker::SentenceBreaker(int maxLen) {
     BasicStringUtil::u8tou16(kInlineMarks[i], strlen(kInlineMarks[i]), ustr1);
     BasicStringUtil::u8tou16(kInlineMarks[i + 1], strlen(kInlineMarks[i + 1]), ustr2);
     inline_marks_.insert(std::make_pair(ustr1[0], ustr2[0]));
+    inline_marks_set_.insert(ustr1[0]);
+    inline_marks_set_.insert(ustr2[0]);
   }
   for (size_t i = 0; i < sizeof(kBreakMarks) / sizeof(char*); i++) {
     UnicodeStr ustr;
diff --git a/kcws/cc/sentence_breaker.h b/kcws/cc/sentence_breaker.h
index f601cf3..915d507 100755
--- a/kcws/cc/sentence_breaker.h
+++ b/kcws/cc/sentence_breaker.h
@@ -32,6 +32,7 @@ class SentenceBreaker {
 
   std::unordered_map<UnicodeCharT, UnicodeCharT> inline_marks_;
   std::unordered_set<UnicodeCharT> break_marks_;
+  std::unordered_set<UnicodeCharT> inline_marks_set_;
   int max_len_;
 };
 }  // namespace kcws