diff --git a/autobuild.xml b/autobuild.xml
index 33423b31ef..dce83a2bb2 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -1932,9 +1932,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>c1be3db6fda7054f615621e9a8139c51</string>
+              <string>8d0ad384de8fbbc9083cac20258fcb0c</string>
               <key>url</key>
-              <string>file:///opt/firestorm/kdu-8.0.6-darwin-202302239.tar.bz2</string>
+              <string>file:///opt/firestorm/kdu-8.1-darwin64-210931415.tar.bz2</string>
             </map>
             <key>name</key>
             <string>darwin64</string>
diff --git a/indra/llkdu/llimagej2ckdu.h b/indra/llkdu/llimagej2ckdu.h
index 9de1159009..fae69c1e92 100644
--- a/indra/llkdu/llimagej2ckdu.h
+++ b/indra/llkdu/llimagej2ckdu.h
@@ -32,9 +32,9 @@
 //
 // KDU core header files
 //
-#ifdef LL_DARWIN
-#define KDU_NO_THREADS
-#endif
+//#ifdef LL_DARWIN
+//#define KDU_NO_THREADS
+//#endif
 
 #include "kdu_elementary.h"
 #include "kdu_messaging.h"
diff --git a/indra/llkdu/llkdumem.h b/indra/llkdu/llkdumem.h
index 28164e157e..88b37105f4 100644
--- a/indra/llkdu/llkdumem.h
+++ b/indra/llkdu/llkdumem.h
@@ -28,9 +28,9 @@
 #define LL_LLKDUMEM_H
 
 // Support classes for reading and writing from memory buffers in KDU
-#ifdef LL_DARWIN
-#define KDU_NO_THREADS
-#endif
+//#ifdef LL_DARWIN
+//#define KDU_NO_THREADS
+//#endif
 
 #define kdu_xxxx "kdu_image.h"
 #include "include_kdu_xxxx.h"