diff --git a/Parser/intrcheck.c b/Parser/intrcheck.c
index 1356191..1c888a5 100644
--- a/Parser/intrcheck.c
+++ b/Parser/intrcheck.c
@@ -21,7 +21,7 @@
 int
 PyOS_InterruptOccurred(void)
 {
-	_wyield();
+    _wyield();
 }
 
 #define OK
@@ -47,7 +47,7 @@
 void
 PyOS_InitInterrupts(void)
 {
-	_go32_want_ctrl_break(1 /* TRUE */);
+    _go32_want_ctrl_break(1 /* TRUE */);
 }
 
 void
@@ -58,7 +58,7 @@
 int
 PyOS_InterruptOccurred(void)
 {
-	return _go32_was_ctrl_break_hit();
+    return _go32_was_ctrl_break_hit();
 }
 
 #else /* !__GNUC__ */
@@ -78,12 +78,12 @@
 int
 PyOS_InterruptOccurred(void)
 {
-	int interrupted = 0;
-	while (kbhit()) {
-		if (getch() == '\003')
-			interrupted = 1;
-	}
-	return interrupted;
+    int interrupted = 0;
+    while (kbhit()) {
+        if (getch() == '\003')
+            interrupted = 1;
+    }
+    return interrupted;
 }
 
 #endif /* __GNUC__ */
@@ -106,7 +106,7 @@
 void
 PyErr_SetInterrupt(void)
 {
-	interrupted = 1;
+    interrupted = 1;
 }
 
 extern int PyErr_CheckSignals(void);
@@ -114,32 +114,32 @@
 static int
 checksignals_witharg(void * arg)
 {
-	return PyErr_CheckSignals();
+    return PyErr_CheckSignals();
 }
 
 static void
 intcatcher(int sig)
 {
-	extern void Py_Exit(int);
-	static char message[] =
+    extern void Py_Exit(int);
+    static char message[] =
 "python: to interrupt a truly hanging Python program, interrupt once more.\n";
-	switch (interrupted++) {
-	case 0:
-		break;
-	case 1:
+    switch (interrupted++) {
+    case 0:
+        break;
+    case 1:
 #ifdef RISCOS
-		fprintf(stderr, message);
+        fprintf(stderr, message);
 #else
-		write(2, message, strlen(message));
+        write(2, message, strlen(message));
 #endif
-		break;
-	case 2:
-		interrupted = 0;
-		Py_Exit(1);
-		break;
-	}
-	PyOS_setsig(SIGINT, intcatcher);
-	Py_AddPendingCall(checksignals_witharg, NULL);
+        break;
+    case 2:
+        interrupted = 0;
+        Py_Exit(1);
+        break;
+    }
+    PyOS_setsig(SIGINT, intcatcher);
+    Py_AddPendingCall(checksignals_witharg, NULL);
 }
 
 static void (*old_siginthandler)(int) = SIG_DFL;
@@ -147,23 +147,23 @@
 void
 PyOS_InitInterrupts(void)
 {
-	if ((old_siginthandler = PyOS_setsig(SIGINT, SIG_IGN)) != SIG_IGN)
-		PyOS_setsig(SIGINT, intcatcher);
+    if ((old_siginthandler = PyOS_setsig(SIGINT, SIG_IGN)) != SIG_IGN)
+        PyOS_setsig(SIGINT, intcatcher);
 }
 
 void
 PyOS_FiniInterrupts(void)
 {
-	PyOS_setsig(SIGINT, old_siginthandler);
+    PyOS_setsig(SIGINT, old_siginthandler);
 }
 
 int
 PyOS_InterruptOccurred(void)
 {
-	if (!interrupted)
-		return 0;
-	interrupted = 0;
-	return 1;
+    if (!interrupted)
+        return 0;
+    interrupted = 0;
+    return 1;
 }
 
 #endif /* !OK */
@@ -172,7 +172,7 @@
 PyOS_AfterFork(void)
 {
 #ifdef WITH_THREAD
-	PyEval_ReInitThreads();
-	PyThread_ReInitTLS();
+    PyEval_ReInitThreads();
+    PyThread_ReInitTLS();
 #endif
 }