diff --git a/0015-Fix-the-binary-compatibility-of-ext-ctl-plugin-with-.patch b/0015-Fix-the-binary-compatibility-of-ext-ctl-plugin-with-.patch
new file mode 100644
index 0000000..5784bb3
--- /dev/null
+++ b/0015-Fix-the-binary-compatibility-of-ext-ctl-plugin-with-.patch
@@ -0,0 +1,55 @@
+From 52160de21ee6a710a746b0881d9581994d039123 Mon Sep 17 00:00:00 2001
+From: Takashi Iwai <tiwai@suse.de>
+Date: Mon, 25 Jun 2012 23:16:14 +0200
+Subject: [PATCH] Fix the binary compatibility of ext-ctl plugin with protocol
+ 1.0.0
+
+Signed-off-by: Takashi Iwai <tiwai@suse.de>
+---
+ include/control_external.h |    9 +++++----
+ src/control/control_ext.c  |    3 ++-
+ 2 files changed, 7 insertions(+), 5 deletions(-)
+
+diff --git a/include/control_external.h b/include/control_external.h
+index 5392ea6..e98f4d6 100644
+--- a/include/control_external.h
++++ b/include/control_external.h
+@@ -125,16 +125,17 @@ struct snd_ctl_ext {
+ 	 * control handle filled by #snd_ctl_ext_create()
+ 	 */
+ 	snd_ctl_t *handle;
++
++	int nonblock;			/**< non-block mode; read-only */
++	int subscribed;			/**< events subscribed; read-only */
++
+ 	/**
+-	 * optional TLV data for the control.
++	 * optional TLV data for the control (since protocol 1.0.1)
+ 	 */
+ 	union {
+ 		snd_ctl_ext_tlv_rw_t *c;
+ 		const unsigned int *p;
+ 	} tlv;
+-
+-	int nonblock;			/**< non-block mode; read-only */
+-	int subscribed;			/**< events subscribed; read-only */
+ };
+ 
+ /** Callback table of ext */
+diff --git a/src/control/control_ext.c b/src/control/control_ext.c
+index cc30766..56552fa 100644
+--- a/src/control/control_ext.c
++++ b/src/control/control_ext.c
+@@ -706,7 +706,8 @@ int snd_ctl_ext_create(snd_ctl_ext_t *ext, const char *name, int mode)
+ 	snd_ctl_t *ctl;
+ 	int err;
+ 
+-	if (ext->version != SND_CTL_EXT_VERSION) {
++	if (ext->version < SNDRV_PROTOCOL_VERSION(1, 0, 0) ||
++	    ext->version > SND_CTL_EXT_VERSION) {
+ 		SNDERR("ctl_ext: Plugin version mismatch\n");
+ 		return -ENXIO;
+ 	}
+-- 
+1.7.10.4
+
diff --git a/alsa.changes b/alsa.changes
index 8c53564..ebde36b 100644
--- a/alsa.changes
+++ b/alsa.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jun 25 23:18:07 CEST 2012 - tiwai@suse.de
+
+- Fix the backward compatibility of ext_ctl plugin (bnc#768742)
+
 -------------------------------------------------------------------
 Mon Jun 11 18:07:15 CEST 2012 - tiwai@suse.de
 
diff --git a/alsa.spec b/alsa.spec
index e7b2983..cfe71b4 100644
--- a/alsa.spec
+++ b/alsa.spec
@@ -65,6 +65,7 @@ Patch11:        0011-pcm-add-missing-break-in-switch.patch
 Patch12:        0012-pcm_dsnoop-comment-fall-through-in-next-case.patch
 Patch13:        0013-tlv-improve-robustness-of-raw-value-ranges.patch
 Patch14:        0014-conf-Add-more-USB-devices-to-S-PDIF-blacklist.patch
+Patch15:        0015-Fix-the-binary-compatibility-of-ext-ctl-plugin-with-.patch
 Patch99:        alsa-lib-doxygen-avoid-crash-for-11.3.diff
 Url:            http://www.alsa-project.org/
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -129,6 +130,7 @@ Architecture.
 %patch12 -p1
 %patch13 -p1
 %patch14 -p1
+%patch15 -p1
 %if %suse_version == 1130
 %patch99 -p1
 %endif