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-rw-r--r--generic/tclThreadTest.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclThreadTest.c b/generic/tclThreadTest.c
index 9c66313..fcf3880 100644
--- a/generic/tclThreadTest.c
+++ b/generic/tclThreadTest.c
@@ -341,7 +341,7 @@ ThreadObjCmd(
} else if (objc == 3
&& strcmp("-main", Tcl_GetString(objv[2])) == 0) {
Tcl_MutexLock(&threadMutex);
- idObj = Tcl_NewLongObj((long)(size_t)mainThreadId);
+ idObj = Tcl_NewWideIntObj((Tcl_WideInt)(size_t)mainThreadId);
Tcl_MutexUnlock(&threadMutex);
} else {
Tcl_WrongNumArgs(interp, 2, objv, NULL);