diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f5afb212a..2ad867701a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -196,8 +196,6 @@ endfunction(get_name_without_last_ext)
 
 include(CheckCCompilerFlag)
 
-set(CMAKE_C_EXTENSIONS OFF)
-set(CMAKE_C_STANDARD 99)
 
 if(CMAKE_COMPILER_IS_GNU)
     # some warnings we want are not available with old GCC versions