diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c316e2..5e819f5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,8 @@ project(layershellqt)
 set(PROJECT_VERSION "5.22.80")
 set(PROJECT_VERSION_MAJOR 5)
 
+set(CMAKE_C_STANDARD 99)
+
 set(QT_MIN_VERSION "5.15.0")
 set(KF5_MIN_VERSION "5.82")