diff --git a/src/KeywordExtractor.hpp b/src/KeywordExtractor.hpp
index 228df79..0744258 100644
--- a/src/KeywordExtractor.hpp
+++ b/src/KeywordExtractor.hpp
@@ -11,7 +11,7 @@ namespace CppJieba
     using namespace Limonp;
 
     /*utf8*/
-    const char * BLACK_LIST[] = {"我们", "他们"};
+    static const char * BLACK_LIST[] = {"我们", "他们"};
 
     class KeywordExtractor: public InitOnOff
     {