diff --git a/cmake-modules/SetCXXCompilerFlags.cmake b/cmake-modules/SetCXXCompilerFlags.cmake
index d411686567..3c69819d69 100644
--- a/cmake-modules/SetCXXCompilerFlags.cmake
+++ b/cmake-modules/SetCXXCompilerFlags.cmake
@@ -6,7 +6,7 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
   # 4.9.3 complains about std::min not being constexpr
-  if (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5))
+  if (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 5))
     message("${PROJECT_NAME} currently requires g++ 5 or greater.  If you need it to work with 4.9, please complain.")
   endif ()
   if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6)
@@ -17,7 +17,7 @@ elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   if (APPLE)
     list(APPEND TARGET_CXX_FLAGS -stdlib=libc++ -DCLI11_EXPERIMENTAL_OPTIONAL=0)
   endif ()
-  if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 7)
+  if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 7)
     list(APPEND TARGET_CXX_FLAGS -DCLI11_EXPERIMENTAL_OPTIONAL=0)
   endif()
   if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6)