sas

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 35e3b349..262dcadb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
   # C++ is by default. C99 is not supported.
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11")