diff --git a/plugins/devel/CMakeLists.txt b/plugins/devel/CMakeLists.txt
index 245bc518c..53157af47 100644
--- a/plugins/devel/CMakeLists.txt
+++ b/plugins/devel/CMakeLists.txt
@@ -1,6 +1,8 @@
 IF(UNIX)
 DFHACK_PLUGIN(vectors vectors.cpp)
-endif()
+ENDIF()
+
+INCLUDE(FindThreads)
 
 ADD_DEFINITIONS(-DDEV_PLUGIN)
 DFHACK_PLUGIN(buildprobe buildprobe.cpp)