diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index 80cdf57..3bc013f 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -30,7 +30,7 @@
 #include "stream_fuzzy_hash.h"
 #include "gram_index_engine.h"
 
-int MAAT_FRAME_VERSION_2_1_20180209=1;
+int MAAT_FRAME_VERSION_2_1_20180226=1;
 
 const char* CHARSET_STRING[]={"NONE","gbk","big5","unicode","utf8","bin",
 							"unicode_ascii_esc","unicode_ascii_aligned","unicode_ncr_dec","unicode_ncr_hex","url_encode_gb2312","url_encode_utf8",""};
@@ -1659,6 +1659,7 @@ int add_expr_rule(struct _Maat_table_info_t* table,struct db_str_rule_t* db_rule
 	if(table->table_type==TABLE_TYPE_EXPR_PLUS)
 	{
 		assert(strlen(db_rule->district)>0);
+		str_unescape(db_rule->district);
 		district_id=get_district_id(scanner, db_rule->district);
 	}
 	group_rule=(struct _Maat_group_inner_t*)HASH_fetch_by_id(scanner->group_hash, db_rule->group_id);
diff --git a/test/maat_json.json b/test/maat_json.json
index 1203835..9a72419 100644
--- a/test/maat_json.json
+++ b/test/maat_json.json
@@ -205,7 +205,7 @@
                             "table_name": "HTTP_REGION",
                             "table_type": "expr_plus",
                             "table_content": {
-                            		"district": "URL",
+                            		"district": "HTTP\\bURL",
                                 "keywords": "abckkk&123",
                                 "expr_type": "and",
                                 "match_method": "sub",
diff --git a/test/maat_test.cpp b/test/maat_test.cpp
index 3121e57..775ef42 100644
--- a/test/maat_test.cpp
+++ b/test/maat_test.cpp
@@ -424,7 +424,7 @@ int test_expr_plus(Maat_feather_t feather,const char* table_name,scan_status_t*
 	int table_id=0;
 	struct Maat_rule_t result[4];
 	int found_pos[4];
-	const char* region_name="URL";
+	const char* region_name="HTTP URL";
 	const char* scan_data="http://www.cyberessays.com/search_results.php?action=search&query=yulingjing,abckkk,1234567";
 	table_id=Maat_table_register(feather,table_name);
 	if(table_id==-1)
@@ -453,6 +453,10 @@ int test_expr_plus(Maat_feather_t feather,const char* table_name,scan_status_t*
 	{
 		printf("Hit expr_plus rule %d.\n",result[0].config_id);
 	}
+	else
+	{
+		printf("Test expr_plus failed.\n");
+	}
 	return ret;
 
 }