diff --git a/library/amiga_createextio.c b/library/amiga_createextio.c
index 94b604e..e4b489d 100644
--- a/library/amiga_createextio.c
+++ b/library/amiga_createextio.c
@@ -1,5 +1,5 @@
 /*
- * $Id: amiga_createextio.c,v 1.1.1.1 2004-07-26 16:30:18 obarthel Exp $
+ * $Id: amiga_createextio.c,v 1.2 2004-11-10 14:55:30 obarthel Exp $
  *
  * :ts=4
  *
@@ -44,6 +44,12 @@
 
 /****************************************************************************/
 
+#if defined(CreateExtIO)
+#undef CreateExtIO
+#endif /* CreateExtIO */
+
+/****************************************************************************/
+
 struct IORequest *
 CreateExtIO(CONST struct MsgPort * port, LONG io_size)
 {
diff --git a/library/amiga_createstdio.c b/library/amiga_createstdio.c
index 2ea311d..30174fb 100644
--- a/library/amiga_createstdio.c
+++ b/library/amiga_createstdio.c
@@ -1,5 +1,5 @@
 /*
- * $Id: amiga_createstdio.c,v 1.1.1.1 2004-07-26 16:30:18 obarthel Exp $
+ * $Id: amiga_createstdio.c,v 1.2 2004-11-10 14:55:30 obarthel Exp $
  *
  * :ts=4
  *
@@ -44,6 +44,12 @@
 
 /****************************************************************************/
 
+#if defined(CreateStdIO)
+#undef CreateStdIO
+#endif /* CreateStdIO */
+
+/****************************************************************************/
+
 struct IOStdReq *
 CreateStdIO(CONST struct MsgPort * port)
 {
diff --git a/library/amiga_deleteextio.c b/library/amiga_deleteextio.c
index 40840b7..29f12ba 100644
--- a/library/amiga_deleteextio.c
+++ b/library/amiga_deleteextio.c
@@ -1,5 +1,5 @@
 /*
- * $Id: amiga_deleteextio.c,v 1.1.1.1 2004-07-26 16:30:18 obarthel Exp $
+ * $Id: amiga_deleteextio.c,v 1.2 2004-11-10 14:55:30 obarthel Exp $
  *
  * :ts=4
  *
@@ -44,6 +44,12 @@
 
 /****************************************************************************/
 
+#if defined(DeleteExtIO)
+#undef DeleteExtIO
+#endif /* DeleteExtIO */
+
+/****************************************************************************/
+
 VOID
 DeleteExtIO(struct IORequest * io)
 {
diff --git a/library/amiga_deletestdio.c b/library/amiga_deletestdio.c
index 747146c..06e69a6 100644
--- a/library/amiga_deletestdio.c
+++ b/library/amiga_deletestdio.c
@@ -1,5 +1,5 @@
 /*
- * $Id: amiga_deletestdio.c,v 1.1.1.1 2004-07-26 16:30:19 obarthel Exp $
+ * $Id: amiga_deletestdio.c,v 1.2 2004-11-10 14:55:30 obarthel Exp $
  *
  * :ts=4
  *
@@ -44,6 +44,12 @@
 
 /****************************************************************************/
 
+#if defined(DeleteStdIO)
+#undef DeleteStdIO
+#endif /* DeleteStdIO */
+
+/****************************************************************************/
+
 VOID
 DeleteStdIO(struct IOStdReq * io)
 {