diff --git a/valgrind-3.8.0-avx-alignment-check.patch b/valgrind-3.8.0-avx-alignment-check.patch
new file mode 100644
index 0000000..7a5421b
--- /dev/null
+++ b/valgrind-3.8.0-avx-alignment-check.patch
@@ -0,0 +1,38 @@
+------------------------------------------------------------------------
+r2499 | sewardj | 2012-09-02 14:13:34 +0200 (Sun, 02 Sep 2012) | 4 lines
+
+Remove alignment checks for VMPSADBW, VPHMINPOSUW, VPALIGNR since they
+do not apply to the AVX versions of these instructions.  Fixes #305926.
+(Jakub Jelinek, jakub@redhat.com)
+
+------------------------------------------------------------------------
+Index: priv/guest_amd64_toIR.c
+===================================================================
+--- valgrind-3.8.0/VEX/priv/guest_amd64_toIR.c	(revision 2498)
++++ valgrind-3.8.0/VEX/priv/guest_amd64_toIR.c	(revision 2499)
+@@ -16028,7 +16028,8 @@
+       DIP("%sphminposuw %s,%s\n", mbV, nameXMMReg(rE), nameXMMReg(rG));
+    } else {
+       addr = disAMode ( &alen, vbi, pfx, delta, dis_buf, 0 );
+-      gen_SEGV_if_not_16_aligned(addr);
++      if (!isAvx)
++         gen_SEGV_if_not_16_aligned(addr);
+       assign( sV, loadLE(Ity_V128, mkexpr(addr)) );
+       delta += alen;
+       DIP("%sphminposuw %s,%s\n", mbV, dis_buf, nameXMMReg(rG));
+@@ -25898,7 +25899,6 @@
+                                            nameXMMReg(rV), nameXMMReg(rG));
+          } else {
+             addr = disAMode( &alen, vbi, pfx, delta, dis_buf, 1 );
+-            gen_SEGV_if_not_16_aligned( addr );
+             assign( sV, loadLE(Ity_V128, mkexpr(addr)) );
+             imm8 = getUChar(delta+alen);
+             delta += alen+1;
+@@ -26291,7 +26291,6 @@
+          } else {
+             addr = disAMode( &alen, vbi, pfx, delta, dis_buf, 
+                              1/* imm8 is 1 byte after the amode */ );
+-            gen_SEGV_if_not_16_aligned( addr );
+             assign( src_vec, loadLE( Ity_V128, mkexpr(addr) ) );
+             imm8 = (Int)getUChar(delta+alen);
+             delta += alen+1;
diff --git a/valgrind.spec b/valgrind.spec
index 47a87a4..90d7060 100644
--- a/valgrind.spec
+++ b/valgrind.spec
@@ -22,6 +22,7 @@ Patch11: valgrind-3.8.0-x86-backtrace.patch
 Patch12: valgrind-3.8.0-find-buildid.patch
 Patch13: valgrind-3.8.0-abbrev-parsing.patch
 Patch14: valgrind-3.8.0-lzcnt-tzcnt-bugfix.patch
+Patch15: valgrind-3.8.0-avx-alignment-check.patch
 
 Obsoletes: valgrind-callgrind
 %ifarch x86_64 ppc64
@@ -115,6 +116,7 @@ for details.
 %patch12 -p1
 %patch13 -p1
 %patch14 -p1
+%patch15 -p1
 
 %build
 CC=gcc
@@ -227,6 +229,7 @@ echo ===============END TESTING===============
 %changelog
 * Tue Sep 11 2012 Mark Wielaard <mjw@redhat.com>
 - Add valgrind-3.8.0-lzcnt-tzcnt-bugfix.patch (KDE#295808)
+- Add valgrind-3.8.0-avx-alignment-check.patch (KDE#305926)
 
 * Mon Aug 27 2012 Mark Wielaard <mjw@redhat.com> 3.8.0-5
 - Add valgrind-3.8.0-abbrev-parsing.patch for #849783 (KDE#305513).