diff --git a/Misc/NEWS b/Misc/NEWS
index 36dfa2c651d..71f9ca19dbf 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -152,6 +152,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
+
 - Fix a bug in the trace module where a bytes object from co_lnotab had its
   items being passed through ord().
 
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 81ec6a06899..eed7177731e 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -1236,8 +1236,7 @@ Tkapp_Call(PyObject *selfptr, PyObject *args)
 	int objc, i;
 	PyObject *res = NULL;
 	TkappObject *self = (TkappObject*)selfptr;
-	/* Could add TCL_EVAL_GLOBAL if wrapped by GlobalCall... */
-	int flags = TCL_EVAL_DIRECT;
+	int flags = TCL_EVAL_DIRECT | TCL_EVAL_GLOBAL;
 
 	/* If args is a single tuple, replace with contents of tuple */
 	if (1 == PyTuple_Size(args)){