diff --git a/indra/cmake/WebKitLibPlugin.cmake b/indra/cmake/WebKitLibPlugin.cmake
index abae1762d..7ed824aea 100644
--- a/indra/cmake/WebKitLibPlugin.cmake
+++ b/indra/cmake/WebKitLibPlugin.cmake
@@ -76,6 +76,7 @@ elseif (LINUX)
         fontconfig
         X11
         Xrender
+        Xext
         GL
         )
      endif (STANDALONE)