diff -Nru nspr-4.9.4/debian/changelog nspr-4.9.4/debian/changelog
--- nspr-4.9.4/debian/changelog	2013-02-22 01:43:35.000000000 +0000
+++ nspr-4.9.4/debian/changelog	2013-02-22 11:50:45.000000000 +0000
@@ -1,3 +1,9 @@
+nspr (2:4.9.4-2ubuntu3arm64.1) precise; urgency=low
+
+  * Add arm64/aarch64 support
+
+ -- Wookey <wookey@wookware.org>  Fri, 22 Feb 2013 11:50:14 +0000
+
 nspr (2:4.9.4-2ubuntu3) raring; urgency=low
 
   * Always pass full build/host args, as the build system gets confused.
diff -Nru nspr-4.9.4/debian/patches/arm64support nspr-4.9.4/debian/patches/arm64support
--- nspr-4.9.4/debian/patches/arm64support	1970-01-01 01:00:00.000000000 +0100
+++ nspr-4.9.4/debian/patches/arm64support	2013-02-22 11:55:21.000000000 +0000
@@ -0,0 +1,103 @@
+Description: Add support for aarch64 architecture on linux
+Author: Riku Voipio 
+
+Origin: https://bugs.launchpad.net/linaro-aarch64/+bug/1095309
+Bug:  https://bugzilla.mozilla.org/show_bug.cgi?id=827271
+Last-update: 2013-02-23
+
+Index: nspr-4.9.4/mozilla/nsprpub/pr/include/md/_linux.cfg
+===================================================================
+--- nspr-4.9.4.orig/mozilla/nsprpub/pr/include/md/_linux.cfg	2012-10-20 00:36:48.000000000 +0100
++++ nspr-4.9.4/mozilla/nsprpub/pr/include/md/_linux.cfg	2013-02-22 11:29:35.000000000 +0000
+@@ -861,6 +861,58 @@
+ #define PR_BYTES_PER_WORD_LOG2   2
+ #define PR_BYTES_PER_DWORD_LOG2  3
+ 
++#elif defined(__aarch64__)
++
++#ifdef __AARCH64EB__
++#undef  IS_LITTLE_ENDIAN
++#define IS_BIG_ENDIAN 1
++#elif defined(__AARCH64EL__)
++#define IS_LITTLE_ENDIAN 1
++#undef  IS_BIG_ENDIAN
++#else
++#error "Unknown Aarch64 endianness."
++#endif
++#define IS_64
++
++#define PR_BYTES_PER_BYTE   1
++#define PR_BYTES_PER_SHORT  2
++#define PR_BYTES_PER_INT    4
++#define PR_BYTES_PER_INT64  8
++#define PR_BYTES_PER_LONG   8
++#define PR_BYTES_PER_FLOAT  4
++#define PR_BYTES_PER_DOUBLE 8
++#define PR_BYTES_PER_WORD   8
++#define PR_BYTES_PER_DWORD  8
++
++#define PR_BITS_PER_BYTE    8
++#define PR_BITS_PER_SHORT   16
++#define PR_BITS_PER_INT     32
++#define PR_BITS_PER_INT64   64
++#define PR_BITS_PER_LONG    64
++#define PR_BITS_PER_FLOAT   32
++#define PR_BITS_PER_DOUBLE  64
++#define PR_BITS_PER_WORD    64
++
++#define PR_BITS_PER_BYTE_LOG2   3
++#define PR_BITS_PER_SHORT_LOG2  4
++#define PR_BITS_PER_INT_LOG2    5
++#define PR_BITS_PER_INT64_LOG2  6
++#define PR_BITS_PER_LONG_LOG2   6
++#define PR_BITS_PER_FLOAT_LOG2  5
++#define PR_BITS_PER_DOUBLE_LOG2 6
++#define PR_BITS_PER_WORD_LOG2   6
++
++#define PR_ALIGN_OF_SHORT   2
++#define PR_ALIGN_OF_INT     4
++#define PR_ALIGN_OF_LONG    8
++#define PR_ALIGN_OF_INT64   8
++#define PR_ALIGN_OF_FLOAT   4
++#define PR_ALIGN_OF_DOUBLE  8
++#define PR_ALIGN_OF_POINTER 8
++#define PR_ALIGN_OF_WORD    8
++
++#define PR_BYTES_PER_WORD_LOG2  3
++#define PR_BYTES_PER_DWORD_LOG2 3
+ #else
+ 
+ #error "Unknown CPU architecture"
+Index: nspr-4.9.4/mozilla/nsprpub/pr/include/md/_linux.h
+===================================================================
+--- nspr-4.9.4.orig/mozilla/nsprpub/pr/include/md/_linux.h	2012-11-10 11:48:55.000000000 +0000
++++ nspr-4.9.4/mozilla/nsprpub/pr/include/md/_linux.h	2013-02-22 11:32:19.000000000 +0000
+@@ -53,6 +53,8 @@
+ #define _PR_SI_ARCHITECTURE "avr32"
+ #elif defined(__m32r__)
+ #define _PR_SI_ARCHITECTURE "m32r"
++#elif defined(__aarch64__)
++#define _PR_SI_ARCHITECTURE "aarch64"
+ #else
+ #error "Unknown CPU architecture"
+ #endif
+@@ -186,7 +188,7 @@
+ })
+ #endif
+ 
+-#if defined(__arm__)
++#if defined(__arm__) || defined(__aarch64__)
+ #if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
+ /* Use GCC built-in functions */
+ #define _PR_HAVE_ATOMIC_OPS
+@@ -242,6 +244,10 @@
+ #endif
+ #endif /* __arm__ */
+ 
++#if defined(__aarch64__)
++#define _MD_MINIMUM_STACK_SIZE 0x20000
++#endif
++
+ #define USE_SETJMP
+ #if (defined(__GLIBC__) && __GLIBC__ >= 2) || defined(ANDROID)
+ #define _PR_POLL_AVAILABLE
diff -Nru nspr-4.9.4/debian/patches/series nspr-4.9.4/debian/patches/series
--- nspr-4.9.4/debian/patches/series	2013-02-21 19:57:32.000000000 +0000
+++ nspr-4.9.4/debian/patches/series	2013-02-22 11:27:23.000000000 +0000
@@ -1,2 +1,3 @@
 bz824742
 cross
+arm64support