diff --git a/cpu/ixp/npe/IxOsalIoMem.c b/cpu/ixp/npe/IxOsalIoMem.c
index 9e540c1..34df92b 100644
--- a/cpu/ixp/npe/IxOsalIoMem.c
+++ b/cpu/ixp/npe/IxOsalIoMem.c
@@ -281,7 +281,7 @@
  * Return value: corresponding physical address, or NULL 
  *               if there is no physical address addressable 
  *               by the given virtual address
- * OS: 	VxWorks, Linux, WinCE, QNX, eCos
+ * OS:	VxWorks, Linux, WinCE, QNX, eCos
  * Reentrant: Yes
  * IRQ safe: Yes
  */
@@ -310,7 +310,7 @@
  * Return value: corresponding physical address, or NULL 
  *               if there is no physical address addressable 
  *               by the given virtual address
- * OS: 	VxWorks, Linux, WinCE, QNX, eCos
+ * OS:	VxWorks, Linux, WinCE, QNX, eCos
  * Reentrant: Yes
  * IRQ safe: Yes
  */