diff --git a/CMakeLists.txt b/CMakeLists.txt
index 95c47c9..2fe7401 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ add_definitions("-D SYS5")
 add_definitions("-D YYDEBUG")
 
 set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_C_STANDARD 17)
 
 set(fdvm_include    projects/dvm/fdvmh/include/fdvmh/)
 set(fdvm_sources    projects/dvm/fdvmh/tools/fdvmh/)