diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -120,6 +120,8 @@
 
 set(MLT_PREFIX ${MLT_ROOT_DIR})
 
+find_package(Threads REQUIRED)
+
 add_subdirectory(data)
 if(KF5DocTools_FOUND)
     add_subdirectory(doc)