diff --git a/CMakeLists.txt b/CMakeLists.txt
index be4b584..248b343 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,7 @@ endmacro()
 xcheck_add_c_compiler_flag(-Wall)
 xcheck_add_c_compiler_flag(-Werror)
 xcheck_add_c_compiler_flag(-Wextra)
+xcheck_add_c_compiler_flag(-Wno-implicit-fallthrough)
 xcheck_add_c_compiler_flag(-Wno-sign-compare)
 xcheck_add_c_compiler_flag(-Wno-missing-field-initializers)
 xcheck_add_c_compiler_flag(-Wno-unused-parameter)