diff --git a/3rdparty/CMakeLists.txt b/3rdparty/CMakeLists.txt
index a492f13683..ab70523818 100644
--- a/3rdparty/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt
@@ -13,3 +13,4 @@ endif()
 if(WITH_TIFF AND NOT TIFF_FOUND)
 	add_subdirectory(libtiff)
 endif()
+add_subdirectory(gtest)