diff --git a/SkipList.cpp b/SkipList.cpp
index ea91c4d..76e4837 100644
--- a/SkipList.cpp
+++ b/SkipList.cpp
@@ -16,6 +16,8 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
+ *
+ * This source code is modified to compile outside of FoundationDB
  */
 
 #include "ConflictSet.h"