diff --git a/3rdparty/CMakeLists.txt b/3rdparty/CMakeLists.txt
index db8d509..8949f44 100644
--- a/3rdparty/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt
@@ -1,3 +1,3 @@
 add_custom_target(3rdparty)
 
-add_subdirectory(Quazip)
+optional_add_subdirectory(Quazip)