diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index d6d200e..1b8ff0f 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -77,7 +77,7 @@
     file(TO_NATIVE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/data_files" target)
 
     if (NOT EXISTS ${link})
-        if (UNIX)
+        if (CMAKE_HOST_UNIX)
             set(command ln -s ${target} ${link})
         else()
             set(command cmd.exe /c mklink ${link} ${target})