diff --git a/src/xpdev/threadwrap.h b/src/xpdev/threadwrap.h
index f7ac1caa19b8f14ea29773cefd8f08c2aeca9798..8375883e3692b165f8f4553234bde888268292c0 100644
--- a/src/xpdev/threadwrap.h
+++ b/src/xpdev/threadwrap.h
@@ -81,6 +81,7 @@ extern "C" {
 #elif defined(__OS2__)
 
 	/* POSIX mutexes */
+	typedef TID pthread_t;
 	typedef HEV pthread_mutex_t;
 
 #else