diff --git a/CMakeLists.txt b/CMakeLists.txt
index cf4420a..1302775 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,11 +8,9 @@ if (${isBigEndian})
     add_definitions(-DWORDS_BIGENDIAN)
 endif()
 
-#判断编译器类型,如果是gcc编译器,则在编译选项中加入c99支持
-if(CMAKE_COMPILER_IS_GNUCXX)
-    add_compile_options(-std=c99)
-    message(STATUS "optional:-std=c99")   
-endif(CMAKE_COMPILER_IS_GNUCXX)
+#在编译选项中加入c99支持
+add_compile_options(-std=c99)
+message(STATUS "optional:-std=c99")   
 
 add_library(spb SHARED protobuf.c)
 add_library(spb_static STATIC protobuf.c)