diff --git a/autobuild.xml b/autobuild.xml
index 9b564ddefce9fdea8e1122531f0e3b668160e073..bd441f5e5feaf32359551a3f1f502a6a2e4d663c 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -2125,6 +2125,8 @@
                 <array>
                   <string>-configuration Release</string>
                   <string>-project SecondLife.xcodeproj</string>
+                  <string>-DENABLE_SIGNING:BOOL=YES</string>
+                  <string>-DSIGNING_IDENTITY:STRING="Developer\ ID\ Application:\ Linden\ Research,\ Inc."</string>
                 </array>
               </map>
               <key>configure</key>
@@ -2152,6 +2154,8 @@
                 <array>
                   <string>-configuration Release</string>
                   <string>-project SecondLife.xcodeproj</string>
+                  <string>-DENABLE_SIGNING:BOOL=YES</string>
+                  <string>-DSIGNING_IDENTITY:STRING="Developer\ ID\ Application:\ Linden\ Research,\ Inc."</string>
                 </array>
               </map>
               <key>configure</key>