diff --git a/CHANGES b/CHANGES
index 5c274f6..2b6d2f7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5,3 +5,4 @@ mISDN-1-1-2:
 	- minor tweaks to misdn-init and to the Kernel-Patch script
 	- fix in CMX: sending is required even during PCM bridge, because sending data overrides bridging temporarily (for sending info tones during bridge)
 	- enabled CMX audio processing for RX data in all cases, because it is essential
+	- now it is save to free skb during interrupt, if memdebug is on
diff --git a/drivers/isdn/hardware/mISDN/memdbg.c b/drivers/isdn/hardware/mISDN/memdbg.c
index 5155a70..480153d 100644
--- a/drivers/isdn/hardware/mISDN/memdbg.c
+++ b/drivers/isdn/hardware/mISDN/memdbg.c
@@ -1,4 +1,5 @@
 #include <linux/stddef.h>
+#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/list.h>
 #include <linux/slab.h>
@@ -177,6 +178,24 @@ __mid_dev_alloc_skb(unsigned int size, char *fn, int line)
 	return(skb);
 }
 
+void
+__mid_kfree_skb(struct sk_buff *skb)
+{
+	if (skb->destructor)
+		skb->destructor(skb);
+	skb->destructor = NULL;
+	kfree_skb(skb);
+}
+
+void
+__mid_dev_kfree_skb(struct sk_buff *skb)
+{
+	if (skb->destructor)
+		skb->destructor(skb);
+	skb->destructor = NULL;
+	dev_kfree_skb(skb);
+}
+
 struct sk_buff
 *__mid_skb_clone(struct sk_buff *skb, int gfp_mask, char *fn, int line)
 {
@@ -280,6 +299,8 @@ EXPORT_SYMBOL(__mid_vmalloc);
 EXPORT_SYMBOL(__mid_vfree);
 EXPORT_SYMBOL(__mid_alloc_skb);
 EXPORT_SYMBOL(__mid_dev_alloc_skb);
+EXPORT_SYMBOL(__mid_kfree_skb);
+EXPORT_SYMBOL(__mid_dev_kfree_skb);
 EXPORT_SYMBOL(__mid_skb_clone);
 EXPORT_SYMBOL(__mid_skb_copy);
 EXPORT_SYMBOL(__mid_skb_realloc_headroom);
diff --git a/drivers/isdn/hardware/mISDN/memdbg.h b/drivers/isdn/hardware/mISDN/memdbg.h
index 53ea83e..54ae1de 100644
--- a/drivers/isdn/hardware/mISDN/memdbg.h
+++ b/drivers/isdn/hardware/mISDN/memdbg.h
@@ -11,6 +11,8 @@
 #undef vfree
 #undef alloc_skb
 #undef dev_alloc_skb
+#undef kfree_skb
+#undef dev_kfree_skb
 #undef skb_clone
 #undef skb_copy
 #undef skb_realloc_headroom
@@ -21,6 +23,8 @@
 #define vfree(p)			__mid_vfree(p)
 #define alloc_skb(a, b)			__mid_alloc_skb(a, b, __FILE__, __LINE__)
 #define dev_alloc_skb(a)		__mid_dev_alloc_skb(a, __FILE__, __LINE__)
+#define kfree_skb(a)			__mid_kfree_skb(a)
+#define dev_kfree_skb(a)		__mid_dev_kfree_skb(a)
 #define skb_clone(a, b)			__mid_skb_clone(a, b, __FILE__, __LINE__)
 #define skb_copy(a, b)			__mid_skb_copy(a, b, __FILE__, __LINE__)
 #define skb_realloc_headroom(a, b)	__mid_skb_realloc_headroom(a, b, __FILE__, __LINE__)
@@ -33,6 +37,8 @@ extern void		__mid_cleanup(void);
 extern int		__mid_init(void);
 extern struct sk_buff	*__mid_alloc_skb(unsigned int,int, char *, int);
 extern struct sk_buff	*__mid_dev_alloc_skb(unsigned int,char *, int);
+extern void		__mid_kfree_skb(struct sk_buff *);
+extern void		__mid_dev_kfree_skb(struct sk_buff *);
 extern struct sk_buff	*__mid_skb_clone(struct sk_buff *, int, char *, int);
 extern struct sk_buff	*__mid_skb_copy(struct sk_buff *, int, char *, int);
 extern struct sk_buff	*__mid_skb_realloc_headroom(struct sk_buff *, unsigned int, char *, int);