diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c93b15c6c..d935417cbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,8 +177,6 @@ string(REGEX MATCH "Clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER_ID}")
 
 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