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-rw-r--r--generic/tclIOCmd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclIOCmd.c b/generic/tclIOCmd.c
index 5a0a8da..938fa01 100644
--- a/generic/tclIOCmd.c
+++ b/generic/tclIOCmd.c
@@ -446,7 +446,7 @@ Tcl_ReadObjCmd(
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"expected non-negative integer but got \"%s\"",
TclGetString(objv[i])));
- Tcl_SetErrorCode(interp, "TCL", "VALUE", "NUMBER", NULL);
+ Tcl_SetErrorCode(interp, "TCL", "VALUE", "NUMBER", (void *)NULL);
return TCL_ERROR;
#if !defined(TCL_NO_DEPRECATED)
}