diff --git a/cache/src/tango_cache_tools.cpp b/cache/src/tango_cache_tools.cpp
index 0b78468..e22a8b9 100644
--- a/cache/src/tango_cache_tools.cpp
+++ b/cache/src/tango_cache_tools.cpp
@@ -220,7 +220,6 @@ int mkdir_according_path(const char * path)
 time_t expires_hdr2timestamp(const char *expires_val, int len)
 {
 	struct tm tm;
-	time_t expire;
 	
 	while(len > 0 && (*expires_val==' '||*expires_val=='\t'||*expires_val=='\r'||*expires_val=='\n'))
 	{
@@ -238,8 +237,7 @@ time_t expires_hdr2timestamp(const char *expires_val, int len)
 		return 0;
 	}
 
-	expire = mktime(&tm);
-	return expire;
+	return mktime(&tm);
 }
 
 //将本地时间戳转换为GMT时间字符串