diff --git a/LICENSE b/LICENSE
index ada38597..497063a2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -19,3 +19,7 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+As an exception, all contents of the "Refs" directory, or any subdirectory named
+"Refs", are not part of the Software and are therefore not subject to the License,
+and remain the exclusive property of their copyright holders.
\ No newline at end of file