diff --git a/detect/features.cmake b/detect/features.cmake
index d3fac25..60ecd79 100644
--- a/detect/features.cmake
+++ b/detect/features.cmake
@@ -1,9 +1,10 @@
 try_compile(cxx-least-11 ${CMAKE_BINARY_DIR}/detect ${CMAKE_SOURCE_DIR}/detect/cxxstd.cpp
-    COMPILE_DEFINITIONS CXX_STANDARD=201103L
-    CMAKE_CXX_STANDARD ${CMAKE_CXX_STANDARD}
+    COMPILE_DEFINITIONS -DCXX_STANDARD=201103
+    CXX_STANDARD ${CMAKE_CXX_STANDARD}
     CXX_STANDARD_REQUIRED ${CMAKE_CXX_STANDARD_REQUIRED}
     CXX_EXTENSIONS ${CMAKE_CXX_EXTENSIONS}
 )
+
 if(NOT cxx-least-11)
     message(FATAL_ERROR "This library requires at least C++11")
 endif()
@@ -14,8 +15,8 @@ if(cxx-least-11)
 endif()
 
 try_compile(cxx-least-14 ${CMAKE_BINARY_DIR}/detect ${CMAKE_SOURCE_DIR}/detect/cxxstd.cpp
-    COMPILE_DEFINITIONS CXX_STANDARD=201402L
-    CMAKE_CXX_STANDARD ${CMAKE_CXX_STANDARD}
+    COMPILE_DEFINITIONS -DCXX_STANDARD=201402
+    CXX_STANDARD ${CMAKE_CXX_STANDARD}
     CXX_STANDARD_REQUIRED ${CMAKE_CXX_STANDARD_REQUIRED}
     CXX_EXTENSIONS ${CMAKE_CXX_EXTENSIONS}
 )