diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4b6559552..a97512181 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -446,7 +446,6 @@ if(NOT (CMAKE_VERSION VERSION_LESS "3.1"))
     if((NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang") AND (NOT ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") AND NOT WIN32)))
         set(CMAKE_CXX_STANDARD 11)
     endif()
-    set(CMAKE_C_EXTENSIONS OFF)
     set(CMAKE_CXX_EXTENSIONS OFF)
 else()
     if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") AND NOT WIN32)