Index: sources/shiboken2/libshiboken/helper.h
--- sources/shiboken2/libshiboken/helper.h.orig
+++ sources/shiboken2/libshiboken/helper.h
@@ -92,7 +92,7 @@ class AutoArrayPointer
         T *data;
 };
 
-using ThreadId = unsigned long long;
+using ThreadId = pthread_t;
 LIBSHIBOKEN_API ThreadId currentThreadId();
 LIBSHIBOKEN_API ThreadId mainThreadId();
 
