diff --git a/conanfile.py b/conanfile.py
index b502360..785c389 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -77,5 +77,8 @@ def _patchCMakeListsFile(self, src_dir):
 
         tools.replace_in_file(cmake_file, "{}".format(cmake_project_line),
                               '''{}
+set(CMAKE_C_STANDARD 11)
 include(${{CMAKE_BINARY_DIR}}/conanbuildinfo.cmake)
 conan_basic_setup()'''.format(cmake_project_line))
+
+        self.output.warn("set C11 Standard")