diff --git a/jieba/__init__.py b/jieba/__init__.py
index d206542..469bb1a 100644
--- a/jieba/__init__.py
+++ b/jieba/__init__.py
@@ -212,9 +212,9 @@ def cut(sentence,cut_all=False):
             sentence = sentence.decode('utf-8')
         except UnicodeDecodeError:
             sentence = sentence.decode('gbk','ignore')
-    re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5a-zA-Z0-9+#&\._]+)"), re.compile(ur"(\s+)")
+    re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5a-zA-Z0-9+#&\._]+)", re.U), re.compile(ur"(\s+)", re.U)
     if cut_all:
-        re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5]+)"), re.compile(ur"[^a-zA-Z0-9+#\n]")
+        re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5]+)", re.U), re.compile(ur"[^a-zA-Z0-9+#\n]", re.U)
     blocks = re_han.split(sentence)
     cut_block = __cut_DAG
     if cut_all: