diff --git a/link_flag.cmake b/link_flag.cmake
index de5b7f4..16bfa8f 100644
--- a/link_flag.cmake
+++ b/link_flag.cmake
@@ -30,8 +30,8 @@ macro(check_link_flag _variable _flag)
 endmacro()
 
 
-macro(append_link_flag flag)
-    check_link_flag (__test_link_flag_${flag} ${flag})
+macro(append_link_flag _flag)
+    check_link_flag (__test_link_flag_${_flag} ${_flag})
     if (__test_link_flag_${_flag})
         set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${_flag}")
     endif()