diff --git a/build/unix/run-mozilla.sh b/build/unix/run-mozilla.sh
index c4555de5f111..9df8c754a128 100755
--- a/build/unix/run-mozilla.sh
+++ b/build/unix/run-mozilla.sh
@@ -372,7 +372,10 @@ SHLIB_PATH=${MOZ_DIST_BIN}${SHLIB_PATH+":$SHLIB_PATH"}
 ## Set LIBPATH for AIX
 LIBPATH=${MOZ_DIST_BIN}${LIBPATH+":$LIBPATH"}
 #
-## Set LIBPATH for BeOS
+## Set DYLD_LIBRARY_PATH for Mac OS X (Darwin)
+DYLD_LIBRARY_PATH=${MOZ_DIST_BIN}${DYLD_LIBRARY_PATH+":$DYLD_LIBRARY_PATH"}
+#
+## Set LIBRARY_PATH for BeOS
 LIBRARY_PATH=${MOZ_DIST_BIN}:${MOZ_DIST_BIN}/components${LIBRARY_PATH+":$LIBRARY_PATH"}
 #
 ## Set ADDON_PATH for BeOS
@@ -401,6 +404,7 @@ then
   if [ -n "$LD_LIBRARY_PATH_64" ]; then
   	echo "LD_LIBRARY_PATH_64=$LD_LIBRARY_PATH_64"
   fi
+  echo "DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH"
   echo "     LIBRARY_PATH=$LIBRARY_PATH"
   echo "       SHLIB_PATH=$SHLIB_PATH"
   echo "          LIBPATH=$LIBPATH"
@@ -412,7 +416,7 @@ then
 fi
 #
 export MOZILLA_FIVE_HOME LD_LIBRARY_PATH
-export SHLIB_PATH LIBPATH LIBRARY_PATH ADDON_PATH
+export SHLIB_PATH LIBPATH LIBRARY_PATH ADDON_PATH DYLD_LIBRARY_PATH
 
 if [ $moz_debug -eq 1 ]
 then