diff --git a/src/3rdparty/CMakeLists.txt b/src/3rdparty/CMakeLists.txt
--- a/src/3rdparty/CMakeLists.txt
+++ b/src/3rdparty/CMakeLists.txt
@@ -1,3 +1,4 @@
 add_subdirectory(md5)
 add_subdirectory(squirrel)
+add_subdirectory(opengl)
 add_subdirectory(os2)