1 files changed, 7 insertions, 0 deletions
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index abbe0ec7bb..94ae48d388 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -613,6 +613,13 @@ Tkapp_New(char *screenName, char *className,
     }
 #endif
 #ifdef WITH_THREAD
+    if (!(v->threaded)) {
+        PyErr_SetString(PyExc_RuntimeError,
+                        "Tcl/Tk was not compiled with --enable-threads but "
+                        "Python has threads enabled");
+        Py_DECREF(v);
+        return 0;
+    }
     if (v->threaded && tcl_lock) {
         /* If Tcl is threaded, we don't need the lock. */
         PyThread_free_lock(tcl_lock);