diff --git a/packages/toolchain/sysutils/squashfs/patches/squashfs-4.0-multi_core_fix.diff b/packages/toolchain/sysutils/squashfs/patches/squashfs-4.0-multi_core_fix.diff
new file mode 100644
index 0000000000..ee6cd73198
--- /dev/null
+++ b/packages/toolchain/sysutils/squashfs/patches/squashfs-4.0-multi_core_fix.diff
@@ -0,0 +1,23 @@
+diff -Naur squashfs4.0-old/squashfs-tools/mksquashfs.c squashfs4.0-new/squashfs-tools/mksquashfs.c
+--- squashfs4.0-old/squashfs-tools/mksquashfs.c	2009-04-05 14:22:48.000000000 -0700
++++ squashfs4.0-new/squashfs-tools/mksquashfs.c	2009-09-14 14:25:37.000000000 -0700
+@@ -1733,8 +1733,8 @@
+ 		entry->buffer->block = bytes;
+ 		bytes += compressed_size;
+ 		fragments_outstanding --;
+-		pthread_mutex_unlock(&fragment_mutex);
+ 		queue_put(to_writer, entry->buffer);
++		pthread_mutex_unlock(&fragment_mutex);
+ 		pthread_mutex_lock(&fragment_mutex);
+ 		TRACE("fragment_locked writing fragment %d, compressed size %d"
+ 			"\n", entry->fragment, compressed_size);
+@@ -2426,8 +2426,8 @@
+ 			write_buffer->block = bytes;
+ 			bytes += compressed_size;
+ 			fragments_outstanding --;
+-			pthread_mutex_unlock(&fragment_mutex);
+ 			queue_put(to_writer, write_buffer);
++			pthread_mutex_unlock(&fragment_mutex);
+ 			TRACE("Writing fragment %lld, uncompressed size %d, "
+ 				"compressed size %d\n", file_buffer->block,
+ 				file_buffer->size, compressed_size);