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-rw-r--r--win/tclWinDde.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/win/tclWinDde.c b/win/tclWinDde.c
index e917570..83c2aa3 100644
--- a/win/tclWinDde.c
+++ b/win/tclWinDde.c
@@ -1253,7 +1253,7 @@ DdeObjCmd(
} else if (objc >= 6 && objc <= 7) {
firstArg = objc - 3;
for (i = 2; i < firstArg; i++) {
- if (Tcl_GetIndexFromObj(NULL, objv[2], ddeExecOptions,
+ if (Tcl_GetIndexFromObj(interp, objv[2], ddeExecOptions,
"option", 0, &argIndex) != TCL_OK) {
return TCL_ERROR;
}