os2 patch by Jeff Rush
diff --git a/Python/thread.c b/Python/thread.c
index 1698b07..f441752 100644
--- a/Python/thread.c
+++ b/Python/thread.c
@@ -149,6 +149,10 @@
 #include "thread_nt.h"
 #endif
 
+#ifdef OS2_THREADS
+#include "thread_os2.h"
+#endif
+
 /*
 #ifdef FOOBAR_THREADS
 #include "thread_foobar.h"