diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index f45e29c6f93..c3d1b61ce78 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -1480,7 +1480,7 @@ void
 init_tkinter()
 {
 #ifndef WIN32
-	extern int (*Py_input_hook) ();
+	extern int (*PyOS_InputHook) ();
 #endif
 	PyObject *m, *d;
 
@@ -1506,8 +1506,8 @@ init_tkinter()
 	ins_string(d, "TCL_VERSION", TCL_VERSION);
 
 #ifndef WIN32
-	if (Py_input_hook == NULL)
-		Py_input_hook = EventHook;
+	if (PyOS_InputHook == NULL)
+		PyOS_InputHook = EventHook;
 #endif
 
 	if (PyErr_Occurred())
diff --git a/Modules/readline.c b/Modules/readline.c
index 8927630eb0b..a1ba13d5ef7 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -12,7 +12,7 @@ extern "C" {
 #include <signal.h>
 
 /* Routines needed from outside (but not declared in a header file). */
-extern int (*Py_input_hook)();
+extern int (*PyOS_InputHook)();
 extern char *readline();
 extern int rl_initialize();
 extern int rl_insert();
@@ -98,7 +98,7 @@ PyOS_GnuReadline(prompt)
 		signal(SIGINT, old_inthandler);
 		return NULL;
 	}
-	rl_event_hook = Py_input_hook;
+	rl_event_hook = PyOS_InputHook;
 	p = readline(prompt);
 	signal(SIGINT, old_inthandler);
 	if (p == NULL) {
diff --git a/PC/python_nt.def b/PC/python_nt.def
index 038d3d09f5c..786d072dc85 100644
--- a/PC/python_nt.def
+++ b/PC/python_nt.def
@@ -54,7 +54,7 @@ EXPORTS
 	PySlice_Type DATA
 	Py_InteractiveFlag DATA
 	PyCObject_Type DATA
-	Py_input_hook DATA
+	PyOS_InputHook DATA
 	PyOS_ReadlineFunctionPointer DATA
 
 	_PyObject_New
diff --git a/Parser/myreadline.c b/Parser/myreadline.c
index 37ee902b8d4..24bb18c653d 100644
--- a/Parser/myreadline.c
+++ b/Parser/myreadline.c
@@ -51,7 +51,7 @@ PERFORMANCE OF THIS SOFTWARE.
 #include "mymalloc.h"
 #include "intrcheck.h"
 
-int (*Py_input_hook)() = NULL;
+int (*PyOS_InputHook)() = NULL;
 
 /* This function restarts a fgets() after an EINTR error occurred
    except if PyOS_InterruptOccurred() returns true. */
@@ -64,8 +64,8 @@ my_fgets(buf, len, fp)
 {
 	char *p;
 	for (;;) {
-		if (Py_input_hook != NULL)
-			(void)(Py_input_hook)();
+		if (PyOS_InputHook != NULL)
+			(void)(PyOS_InputHook)();
 		errno = 0;
 		p = fgets(buf, len, fp);
 		if (p != NULL)