diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e0fa0a2ce..84ac1f8c53 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -195,7 +195,7 @@ endif()
 if(APPLE)
     add_compile_options(-Wsign-compare)
     add_definitions(-DDarwin)
-    add_definitions(-Wno-deprecated-register)
+    add_compile_options(-Wno-deprecated-register)
 elseif(CYGWIN)
     add_definitions(-DWIN32)
     if(AERON_TESTS)