diff --git a/plugins/CMakeLists.txt b/plugins/CMakeLists.txt
index 5847f3b6f..72d0be03a 100644
--- a/plugins/CMakeLists.txt
+++ b/plugins/CMakeLists.txt
@@ -96,7 +96,9 @@ ENDMACRO(DFHACK_PLUGIN)
 #endmacro()
 
 #RECURSE_DIRS()
-add_subdirectory (qtplug)
+IF(UNIX)
+    add_subdirectory (qtplug)
+ENDIF()
 
 DFHACK_PLUGIN(reveal reveal.cpp)
 OPTION(BUILD_KITTENS "Build the kittens plugin." OFF)
diff --git a/plugins/qtplug/qtplug.cpp b/plugins/qtplug/qtplug.cpp
index b103c0237..8b7ace6bf 100644
--- a/plugins/qtplug/qtplug.cpp
+++ b/plugins/qtplug/qtplug.cpp
@@ -20,6 +20,7 @@ using namespace DFHack;
 static int runnable(void *);
 static SDL::Mutex * instance_mutex = 0;
 static bool running = false;
+static SDL::Thread * QTThread;
 
 DFhackCExport command_result runqt (Core * c, vector <string> & parameters);
 
@@ -47,7 +48,7 @@ DFhackCExport command_result runqt (Core * c, vector <string> & parameters)
     if(!running)
     {
         running = true;
-        SDL::Thread * IO = SDL_CreateThread(runnable, 0);
+        QTThread = SDL_CreateThread(runnable, 0);
     }
     else
     {