This header was supposed to be committed in r69476
diff --git a/Modules/tkinter.h b/Modules/tkinter.h
new file mode 100644
index 0000000..57be878
--- /dev/null
+++ b/Modules/tkinter.h
@@ -0,0 +1,25 @@
+#ifndef TKINTER_H
+#define TKINTER_H
+
+/* This header is used to share some macros between _tkinter.c and
+ * tkappinit.c */
+
+/* TK_RELEASE_LEVEL is always one of the following:
+ * TCL_ALPHA_RELEASE 0
+ * TCL_BETA_RELEASE 1
+ * TCL_FINAL_RELEASE 2
+ */
+#define TK_VERSION_HEX ((TK_MAJOR_VERSION << 24) | \
+ (TK_MINOR_VERSION << 16) | \
+ (TK_RELEASE_SERIAL << 8) | \
+ (TK_RELEASE_LEVEL << 0))
+
+/* Protect Tk 8.4.13 and older from a deadlock that happens when trying
+ * to load tk after a failed attempt. */
+#if TK_VERSION_HEX < 0x08040e02
+#define TKINTER_PROTECT_LOADTK
+#define TKINTER_LOADTK_ERRMSG \
+ "Calling Tk_Init again after a previous call failed might deadlock"
+#endif
+
+#endif /* !TKINTER_H */