diff --git a/setup.py b/setup.py
index c2e1dc29..6efe359e 100644
--- a/setup.py
+++ b/setup.py
@@ -83,6 +83,7 @@ def build_extensions(self):
 
             args = [
                 f"--prefix={OUTPUT}",
+                "--enable-thread-safety",
                 "--disable-auto-ptr",
                 "--enable-allcxxplugins",
                 "--enable-cgal-header-only",