diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba50246..249656b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,9 +9,7 @@ option(LIBICSNEO_BUILD_ICSNEOC_STATIC "Build static C library" ON)
 option(LIBICSNEO_BUILD_ICSNEOLEGACY "Build icsnVC40 compatibility library" ON)
 set(LIBICSNEO_NPCAP_INCLUDE_DIR "" CACHE STRING "Npcap include directory; set to build with Npcap")
 
-if(NOT CMAKE_CXX_STANDARD)
-	set(CMAKE_CXX_STANDARD 11)
-endif()
+set(CMAKE_CXX_STANDARD_REQUIRED 11)
 
 include(GNUInstallDirs)