diff --git a/CMakeLists.txt b/CMakeLists.txt
index a595323..9feda72 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,10 @@ ENDIF()
 include_directories("/usr/local/include")
 link_directories("/usr/local/lib")
 
+#在编译选项中加入c99支持
+add_compile_options(-std=c99)
+message(STATUS "optional:-std=c99")
+
 add_executable(simple-dict-server server.c dict.c crypto.c)
 add_executable(simple-dict-client client.c crypto.c)
 add_executable(migrate migrate.c)